Internet-Draft JOSE HPKE PQ February 2026
Skokan & Campbell Expires 12 August 2026 [Page]
Workgroup:
Javascript Object Signing and Encryption
Internet-Draft:
draft-skokan-jose-hpke-pq-pqt-03
Published:
Intended Status:
Standards Track
Expires:
Authors:
F. Skokan
Okta
B. Campbell
Ping Identity

JOSE HPKE PQ & PQ/T Algorithm Registrations

Abstract

This document registers Post-Quantum (PQ) and Post-Quantum/Traditional (PQ/T) hybrid algorithm identifiers for use with JSON Object Signing and Encryption (JOSE), building on the Hybrid Public Key Encryption (HPKE) framework.

About This Document

This note is to be removed before publishing as an RFC.

The latest revision of this draft can be found at https://panva.github.io/jose-hpke-pq-pqt/draft-skokan-jose-hpke-pq-pqt.html. Status information for this document may be found at https://datatracker.ietf.org/doc/draft-skokan-jose-hpke-pq-pqt/.

Discussion of this document takes place on the Javascript Object Signing and Encryption Working Group mailing list (mailto:jose@ietf.org), which is archived at https://mailarchive.ietf.org/arch/browse/jose/. Subscribe at https://www.ietf.org/mailman/listinfo/jose/.

Source for this draft and an issue tracker can be found at https://github.com/panva/jose-hpke-pq-pqt.

Status of This Memo

This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79.

Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet-Drafts is at https://datatracker.ietf.org/drafts/current/.

Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress."

This Internet-Draft will expire on 12 August 2026.

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Table of Contents

1. Introduction

[I-D.ietf-jose-hpke-encrypt] defines how to use Hybrid Public Key Encryption (HPKE) with JSON Web Encryption (JWE) using traditional Key Encapsulation Mechanisms (KEM) based on Elliptic-curve Diffie-Hellman (ECDH).

This document extends the set of registered HPKE algorithms to include Post-Quantum (PQ) and Post-Quantum/Traditional (PQ/T) hybrid KEMs, as defined in [I-D.ietf-hpke-pq]. These algorithms provide protection against attacks by cryptographically relevant quantum computers.

The term “PQ/T hybrid” is used here consistent with [I-D.ietf-hpke-pq] to denote a combination of post-quantum and traditional algorithms, and should not be confused with HPKE's use of "hybrid" to describe the combination of asymmetric and symmetric encryption.

2. Conventions and Definitions

The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in BCP 14 [RFC2119] [RFC8174] when, and only when, they appear in all capitals, as shown here.

3. Algorithm Identifiers

This section defines the algorithm identifiers for PQ and PQ/T HPKE-based encryption in JOSE. Each algorithm is defined by a combination of an HPKE KEM, a Key Derivation Function (KDF), and an Authenticated Encryption with Associated Data (AEAD) algorithm.

All algorithms defined in this section follow the same operational model as those in [I-D.ietf-jose-hpke-encrypt], supporting both integrated encryption as defined in Section 5 of [I-D.ietf-jose-hpke-encrypt] and key encryption as defined in Section 6 of [I-D.ietf-jose-hpke-encrypt].

Test vectors for all algorithms defined in this section are provided in Appendix A.

3.1. PQ/T Hybrid Integrated Encryption Algorithms

The following table lists the algorithm identifiers for PQ/T hybrid integrated encryption, where HPKE directly encrypts the plaintext without a separate Content Encryption Key:

Table 1: PQ/T Hybrid Integrated Encryption Algorithms
"alg" value HPKE KEM HPKE KDF HPKE AEAD
HPKE-8 MLKEM768-P256 (0x0050) SHAKE256 (0x0011) AES-256-GCM (0x0002)
HPKE-9 MLKEM768-P256 (0x0050) SHAKE256 (0x0011) ChaCha20Poly1305 (0x0003)
HPKE-10 MLKEM768-X25519 (0x647a) SHAKE256 (0x0011) AES-256-GCM (0x0002)
HPKE-11 MLKEM768-X25519 (0x647a) SHAKE256 (0x0011) ChaCha20Poly1305 (0x0003)
HPKE-12 MLKEM1024-P384 (0x0051) SHAKE256 (0x0011) AES-256-GCM (0x0002)
HPKE-13 MLKEM1024-P384 (0x0051) SHAKE256 (0x0011) ChaCha20Poly1305 (0x0003)

These algorithms combine ML-KEM with a traditional elliptic curve algorithm in a PQ/T hybrid KEM construction, with the goal that compromise of either the post-quantum or the traditional component alone does not undermine the security of the resulting encryption.

3.2. Pure PQ Integrated Encryption Algorithms

The following table lists the algorithm identifiers for pure post-quantum integrated encryption:

Table 2: Pure PQ Integrated Encryption Algorithms
"alg" value HPKE KEM HPKE KDF HPKE AEAD
HPKE-14 ML-KEM-768 (0x0041) SHAKE256 (0x0011) AES-256-GCM (0x0002)
HPKE-15 ML-KEM-768 (0x0041) SHAKE256 (0x0011) ChaCha20Poly1305 (0x0003)
HPKE-16 ML-KEM-1024 (0x0042) SHAKE256 (0x0011) AES-256-GCM (0x0002)
HPKE-17 ML-KEM-1024 (0x0042) SHAKE256 (0x0011) ChaCha20Poly1305 (0x0003)

These algorithms provide pure post-quantum security using ML-KEM without a traditional algorithm component.

3.3. PQ/T Hybrid Key Encryption Algorithms

The following table lists the algorithm identifiers for PQ/T hybrid key encryption, where HPKE encrypts the Content Encryption Key:

Table 3: PQ/T Hybrid Key Encryption Algorithms
"alg" value HPKE KEM HPKE KDF HPKE AEAD
HPKE-8-KE MLKEM768-P256 (0x0050) SHAKE256 (0x0011) AES-256-GCM (0x0002)
HPKE-9-KE MLKEM768-P256 (0x0050) SHAKE256 (0x0011) ChaCha20Poly1305 (0x0003)
HPKE-10-KE MLKEM768-X25519 (0x647a) SHAKE256 (0x0011) AES-256-GCM (0x0002)
HPKE-11-KE MLKEM768-X25519 (0x647a) SHAKE256 (0x0011) ChaCha20Poly1305 (0x0003)
HPKE-12-KE MLKEM1024-P384 (0x0051) SHAKE256 (0x0011) AES-256-GCM (0x0002)
HPKE-13-KE MLKEM1024-P384 (0x0051) SHAKE256 (0x0011) ChaCha20Poly1305 (0x0003)

These are the key encryption counterparts of the PQ/T hybrid integrated encryption algorithms defined in Table 1.

3.4. Pure PQ Key Encryption Algorithms

The following table lists the algorithm identifiers for pure post-quantum key encryption:

Table 4: Pure PQ Key Encryption Algorithms
"alg" value HPKE KEM HPKE KDF HPKE AEAD
HPKE-14-KE ML-KEM-768 (0x0041) SHAKE256 (0x0011) AES-256-GCM (0x0002)
HPKE-15-KE ML-KEM-768 (0x0041) SHAKE256 (0x0011) ChaCha20Poly1305 (0x0003)
HPKE-16-KE ML-KEM-1024 (0x0042) SHAKE256 (0x0011) AES-256-GCM (0x0002)
HPKE-17-KE ML-KEM-1024 (0x0042) SHAKE256 (0x0011) ChaCha20Poly1305 (0x0003)

These are the key encryption counterparts of the pure PQ integrated encryption algorithms defined in Table 2.

4. JSON Web Key Representation

Keys for the algorithms defined in this document use the "AKP" (Algorithm Key Pair) key type defined in [I-D.ietf-cose-dilithium].

For the algorithms in this document, the "pub" parameter contains the base64url encoding of HPKE's SerializePublicKey() output for the corresponding KEM, and the "priv" parameter contains the base64url encoding of HPKE's SerializePrivateKey() output.

Examples of JWKs for each algorithm are provided in Appendix A.

5. Security Considerations

The security considerations of [I-D.ietf-jose-hpke-encrypt] and [I-D.ietf-hpke-pq] apply to this document.

This document does not register algorithms using ML-KEM-512. As noted in Section 3 of [I-D.ietf-hpke-pq], given the relative novelty of ML-KEM, there is concern that new cryptanalysis might reduce the security level of ML-KEM-512. Use of ML-KEM-768 or ML-KEM-1024 acts as a hedge against such cryptanalysis at a modest performance penalty.

6. IANA Considerations

6.1. JSON Web Signature and Encryption Algorithms Registry

This document requests registration of the following values in the IANA "JSON Web Signature and Encryption Algorithms" registry established by [RFC7518]:

6.1.1. HPKE-8

  • Algorithm Name: HPKE-8

  • Algorithm Description: Integrated Encryption with HPKE using MLKEM768-P256 KEM, SHAKE256 KDF, and AES-256-GCM AEAD

  • Algorithm Usage Location(s): "alg"

  • JOSE Implementation Requirements: Optional

  • Change Controller: IETF

  • Specification Document(s): Table 1 of this document

  • Algorithm Analysis Document(s): [I-D.ietf-hpke-pq]

6.1.2. HPKE-8-KE

  • Algorithm Name: HPKE-8-KE

  • Algorithm Description: Key Encryption with HPKE using MLKEM768-P256 KEM, SHAKE256 KDF, and AES-256-GCM AEAD

  • Algorithm Usage Location(s): "alg"

  • JOSE Implementation Requirements: Optional

  • Change Controller: IETF

  • Specification Document(s): Table 3 of this document

  • Algorithm Analysis Document(s): [I-D.ietf-hpke-pq]

6.1.3. HPKE-9

  • Algorithm Name: HPKE-9

  • Algorithm Description: Integrated Encryption with HPKE using MLKEM768-P256 KEM, SHAKE256 KDF, and ChaCha20Poly1305 AEAD

  • Algorithm Usage Location(s): "alg"

  • JOSE Implementation Requirements: Optional

  • Change Controller: IETF

  • Specification Document(s): Table 1 of this document

  • Algorithm Analysis Document(s): [I-D.ietf-hpke-pq]

6.1.4. HPKE-9-KE

  • Algorithm Name: HPKE-9-KE

  • Algorithm Description: Key Encryption with HPKE using MLKEM768-P256 KEM, SHAKE256 KDF, and ChaCha20Poly1305 AEAD

  • Algorithm Usage Location(s): "alg"

  • JOSE Implementation Requirements: Optional

  • Change Controller: IETF

  • Specification Document(s): Table 3 of this document

  • Algorithm Analysis Document(s): [I-D.ietf-hpke-pq]

6.1.5. HPKE-10

  • Algorithm Name: HPKE-10

  • Algorithm Description: Integrated Encryption with HPKE using MLKEM768-X25519 KEM, SHAKE256 KDF, and AES-256-GCM AEAD

  • Algorithm Usage Location(s): "alg"

  • JOSE Implementation Requirements: Optional

  • Change Controller: IETF

  • Specification Document(s): Table 1 of this document

  • Algorithm Analysis Document(s): [I-D.ietf-hpke-pq]

6.1.6. HPKE-10-KE

  • Algorithm Name: HPKE-10-KE

  • Algorithm Description: Key Encryption with HPKE using MLKEM768-X25519 KEM, SHAKE256 KDF, and AES-256-GCM AEAD

  • Algorithm Usage Location(s): "alg"

  • JOSE Implementation Requirements: Optional

  • Change Controller: IETF

  • Specification Document(s): Table 3 of this document

  • Algorithm Analysis Document(s): [I-D.ietf-hpke-pq]

6.1.7. HPKE-11

  • Algorithm Name: HPKE-11

  • Algorithm Description: Integrated Encryption with HPKE using MLKEM768-X25519 KEM, SHAKE256 KDF, and ChaCha20Poly1305 AEAD

  • Algorithm Usage Location(s): "alg"

  • JOSE Implementation Requirements: Optional

  • Change Controller: IETF

  • Specification Document(s): Table 1 of this document

  • Algorithm Analysis Document(s): [I-D.ietf-hpke-pq]

6.1.8. HPKE-11-KE

  • Algorithm Name: HPKE-11-KE

  • Algorithm Description: Key Encryption with HPKE using MLKEM768-X25519 KEM, SHAKE256 KDF, and ChaCha20Poly1305 AEAD

  • Algorithm Usage Location(s): "alg"

  • JOSE Implementation Requirements: Optional

  • Change Controller: IETF

  • Specification Document(s): Table 3 of this document

  • Algorithm Analysis Document(s): [I-D.ietf-hpke-pq]

6.1.9. HPKE-12

  • Algorithm Name: HPKE-12

  • Algorithm Description: Integrated Encryption with HPKE using MLKEM1024-P384 KEM, SHAKE256 KDF, and AES-256-GCM AEAD

  • Algorithm Usage Location(s): "alg"

  • JOSE Implementation Requirements: Optional

  • Change Controller: IETF

  • Specification Document(s): Table 1 of this document

  • Algorithm Analysis Document(s): [I-D.ietf-hpke-pq]

6.1.10. HPKE-12-KE

  • Algorithm Name: HPKE-12-KE

  • Algorithm Description: Key Encryption with HPKE using MLKEM1024-P384 KEM, SHAKE256 KDF, and AES-256-GCM AEAD

  • Algorithm Usage Location(s): "alg"

  • JOSE Implementation Requirements: Optional

  • Change Controller: IETF

  • Specification Document(s): Table 3 of this document

  • Algorithm Analysis Document(s): [I-D.ietf-hpke-pq]

6.1.11. HPKE-13

  • Algorithm Name: HPKE-13

  • Algorithm Description: Integrated Encryption with HPKE using MLKEM1024-P384 KEM, SHAKE256 KDF, and ChaCha20Poly1305 AEAD

  • Algorithm Usage Location(s): "alg"

  • JOSE Implementation Requirements: Optional

  • Change Controller: IETF

  • Specification Document(s): Table 1 of this document

  • Algorithm Analysis Document(s): [I-D.ietf-hpke-pq]

6.1.12. HPKE-13-KE

  • Algorithm Name: HPKE-13-KE

  • Algorithm Description: Key Encryption with HPKE using MLKEM1024-P384 KEM, SHAKE256 KDF, and ChaCha20Poly1305 AEAD

  • Algorithm Usage Location(s): "alg"

  • JOSE Implementation Requirements: Optional

  • Change Controller: IETF

  • Specification Document(s): Table 3 of this document

  • Algorithm Analysis Document(s): [I-D.ietf-hpke-pq]

6.1.13. HPKE-14

  • Algorithm Name: HPKE-14

  • Algorithm Description: Integrated Encryption with HPKE using ML-KEM-768 KEM, SHAKE256 KDF, and AES-256-GCM AEAD

  • Algorithm Usage Location(s): "alg"

  • JOSE Implementation Requirements: Optional

  • Change Controller: IETF

  • Specification Document(s): Table 2 of this document

  • Algorithm Analysis Document(s): [I-D.ietf-hpke-pq]

6.1.14. HPKE-14-KE

  • Algorithm Name: HPKE-14-KE

  • Algorithm Description: Key Encryption with HPKE using ML-KEM-768 KEM, SHAKE256 KDF, and AES-256-GCM AEAD

  • Algorithm Usage Location(s): "alg"

  • JOSE Implementation Requirements: Optional

  • Change Controller: IETF

  • Specification Document(s): Table 4 of this document

  • Algorithm Analysis Document(s): [I-D.ietf-hpke-pq]

6.1.15. HPKE-15

  • Algorithm Name: HPKE-15

  • Algorithm Description: Integrated Encryption with HPKE using ML-KEM-768 KEM, SHAKE256 KDF, and ChaCha20Poly1305 AEAD

  • Algorithm Usage Location(s): "alg"

  • JOSE Implementation Requirements: Optional

  • Change Controller: IETF

  • Specification Document(s): Table 2 of this document

  • Algorithm Analysis Document(s): [I-D.ietf-hpke-pq]

6.1.16. HPKE-15-KE

  • Algorithm Name: HPKE-15-KE

  • Algorithm Description: Key Encryption with HPKE using ML-KEM-768 KEM, SHAKE256 KDF, and ChaCha20Poly1305 AEAD

  • Algorithm Usage Location(s): "alg"

  • JOSE Implementation Requirements: Optional

  • Change Controller: IETF

  • Specification Document(s): Table 4 of this document

  • Algorithm Analysis Document(s): [I-D.ietf-hpke-pq]

6.1.17. HPKE-16

  • Algorithm Name: HPKE-16

  • Algorithm Description: Integrated Encryption with HPKE using ML-KEM-1024 KEM, SHAKE256 KDF, and AES-256-GCM AEAD

  • Algorithm Usage Location(s): "alg"

  • JOSE Implementation Requirements: Optional

  • Change Controller: IETF

  • Specification Document(s): Table 2 of this document

  • Algorithm Analysis Document(s): [I-D.ietf-hpke-pq]

6.1.18. HPKE-16-KE

  • Algorithm Name: HPKE-16-KE

  • Algorithm Description: Key Encryption with HPKE using ML-KEM-1024 KEM, SHAKE256 KDF, and AES-256-GCM AEAD

  • Algorithm Usage Location(s): "alg"

  • JOSE Implementation Requirements: Optional

  • Change Controller: IETF

  • Specification Document(s): Table 4 of this document

  • Algorithm Analysis Document(s): [I-D.ietf-hpke-pq]

6.1.19. HPKE-17

  • Algorithm Name: HPKE-17

  • Algorithm Description: Integrated Encryption with HPKE using ML-KEM-1024 KEM, SHAKE256 KDF, and ChaCha20Poly1305 AEAD

  • Algorithm Usage Location(s): "alg"

  • JOSE Implementation Requirements: Optional

  • Change Controller: IETF

  • Specification Document(s): Table 2 of this document

  • Algorithm Analysis Document(s): [I-D.ietf-hpke-pq]

6.1.20. HPKE-17-KE

  • Algorithm Name: HPKE-17-KE

  • Algorithm Description: Key Encryption with HPKE using ML-KEM-1024 KEM, SHAKE256 KDF, and ChaCha20Poly1305 AEAD

  • Algorithm Usage Location(s): "alg"

  • JOSE Implementation Requirements: Optional

  • Change Controller: IETF

  • Specification Document(s): Table 4 of this document

  • Algorithm Analysis Document(s): [I-D.ietf-hpke-pq]

7. References

7.1. Normative References

[I-D.ietf-cose-dilithium]
Prorock, M. and O. Steele, "ML-DSA for JOSE and COSE", Work in Progress, Internet-Draft, draft-ietf-cose-dilithium-11, , <https://datatracker.ietf.org/doc/html/draft-ietf-cose-dilithium-11>.
[I-D.ietf-hpke-pq]
Barnes, R. and D. Connolly, "Post-Quantum and Post-Quantum/Traditional Hybrid Algorithms for HPKE", Work in Progress, Internet-Draft, draft-ietf-hpke-pq-03, , <https://datatracker.ietf.org/doc/html/draft-ietf-hpke-pq-03>.
[I-D.ietf-jose-hpke-encrypt]
Reddy.K, T., Tschofenig, H., Banerjee, A., Steele, O., and M. B. Jones, "Use of Hybrid Public Key Encryption (HPKE) with JSON Web Encryption (JWE)", Work in Progress, Internet-Draft, draft-ietf-jose-hpke-encrypt-15, , <https://datatracker.ietf.org/doc/html/draft-ietf-jose-hpke-encrypt-15>.
[RFC2119]
Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/RFC2119, , <https://www.rfc-editor.org/rfc/rfc2119>.
[RFC8174]
Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC 2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174, , <https://www.rfc-editor.org/rfc/rfc8174>.

7.2. Informative References

[RFC7518]
Jones, M., "JSON Web Algorithms (JWA)", RFC 7518, DOI 10.17487/RFC7518, , <https://www.rfc-editor.org/rfc/rfc7518>.

Appendix A. Test Vectors

This appendix provides test vectors for each algorithm defined in this document. For each algorithm, a private JWK, a Flattened JWE JSON Serialization example with Additional Authenticated Data, and a JWE Compact Serialization example are provided.

A.1. HPKE-8 

{
  "kty": "AKP",
  "alg": "HPKE-8",
  "kid": "DmOWQi-VwrjZWjO6mQQWdv3CJ_v9k_PH3vS7S0xoah8",
  "pub": "6XRnIatC1KtI7DZlj8ISDxZvtsFeBOPKQETMRRYb45dR0kw6TDSb8UMXHHWhUBdbEBof5gvIJacZG4exGku4JsysQcc9AVR6Ydih7kaPNQgCiiKw9QACNCMWx2p171RVCpGSFoOwaejNGZeNJKS4jqulOWFQHGtbWhl64HZzlkZMxhqdA-EecEOLhzCkbCMMtXxb-cxUVkOxQpKkO5ofmEaKH7tjyNZyVsxqgUZFn6K8jOq9g6GCOEG4awGB6AZC72yNXLDBnVCy_7OMn2bAeos8AvhHkbsL0hsFFjsnWcG_IYvNPzUAcyGZlpsqjXJIh4AUxTi6iFeJFOE08nNM3KQEYlxkMAulVas2E4KU_TGeoEJeZjA5TPWVAQiPFFQ4nNRh1kotf4OHtHQVpaMzAypItIXAU8LI_gl4rdFKTfYu18MKnygjEnO9Z7e2cYwj_hqx-AQdA6ulQBcNR4DFSCOTLnMB22GMXGVOMDCmiaxZvchp9iEKNJG4TkZQmoKwR9pbEbahmsm1WvUbR6kEqNYOE0MMsRWNM3RBNltm0Iqo8RKMlpRq5RceWRRdjRkKdChyhuJ2ebBI05iRsuE6AwWEbCV6dQqNZ0gqdeU5imECjFWLNqYvs0BaxDgmoSdg4rFlq3UrZ3gLD4UTT4kM97HO5iedxoox__octTEEImMTf8uJI2M0nKTIpbWBHlofTfulcqVXjFYpr9GvuKM_mElaoJwn3MQYrFNLcwY-fzy9fqvGFtF-62fHcpcL7SVUu9KW7igiAHQfwXmCnMQzsxwLowVk8mFjDYgV2iIoNIeuwZdc8-I0A1CLiqOQNwCLObgSMVeo-WUvzmocsFOUtSUS1chNNwpjMCGKuHxOYOcvKLxH7mvPp6czIovPsqQUZdloA5Wqt8U1sDRZfrhRlUi4IVoTmevBpaEYK_Jze3cIMOkRKdO5Y1tB4TIcAHE8oNUarUEYx1YDUinIolRBBDyBAmR7rbV4iGenGHwgeTIZ0cpppFEDbkAX4AaG4YKGdGWrgWhhiDoPX2mda_BLOSilnlhmM2BhqGZBkKK2E1B5fgER-_AMYeVl9HEoKCFHm6KApgnLVnYMQjEv7kC6tsqxs-pOcnSs2EpGKMMk4gdIlcFNxsVU6sXINHADvNmtNyQgjRFKhmNPtYchXHWz_tgccWNkm1DD6qMATOoZcscAu8BBpKUwUIkIUICwKpay5KUsFjKpC9HPqSONVMVu7GYysVC8UDTMetWoXlSiDetoiolwFGGpIscf1ic_rUhbD3pyxVI8DqCsdFg2NcSvIJRoJBO12KHKRIYnc8ObgCzJBULNZ1Rmc5tCbmcW_mmhg0OiA7EJjwi_eoY82_g0eiyAr0K4DmBy8yqWDZV45KfAnYQBQZvK8zlj0npGqVWusxzP1mw_Dbhnp-Z6SyIrHNI9unG7DbeDhcnBD2QBp2t6cNgvUoCLzPReQPYy_bwVEwcrPSO4SjUG8mhuybiU5NWdgIRD95gD1ApNRoZeJIhfP7yM1vt1ZCxfV0xEvUSb25DOebimyplEvv7nxam2hbnlRQme00B5wPt9pETxPSQE4ZUd6u60U9e6F3C-Fqjwfg_xYMk3oOcZQ-P5NrsNxK3ho7xmtpSKVahpf_2P_o2Vz8YFc7t2S7jAx9bRLQQpbA",
  "priv": "c1il1CJwUdajeAm8PMZMq4mw2PH9Z2vThLkHU2MQ10A"
}
Figure 1: HPKE-8 Private JWK 
{
  "protected": "eyJhbGciOiJIUEtFLTgiLCJraWQiOiJEbU9XUWktVndyalpXak82bVFRV2R2M0NKX3Y5a19QSDN2UzdTMHhvYWg4In0",
  "aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc",
  "encrypted_key": "zn5k3HEI3RkdpXGGdYM2Jh-dKMjpaOIOdV0ktJYiT_4ZF7hoHGIxdvtRi1qFccO0Syy0nGCqquwQXTiGvVXV8-xM51oP5ihdfMezPX_vBMpaiG-9e9uWKnH9iS1YeXXKNwTXqRTlT4Y0gVmcQ3PC0-JiG3tFfxWUd_njQMJz9RBLS6XxFxh2huK_z8DdEgBJiE00XOwfmtzradLowkaOrHDMjLmkDfj4izxI1NplLAGl6k2-iw1GVBP3GOZH5oDxwdo9pzGccHxifsnF3mT5Rpsr7hOVn-JQuWRVB7ym-DeIJhHdtttknxfh_n6C1oKRgC9wD6kXu3N1yI7Xrya-ZTt-iL8qyDFvj-s84V6qPWTVWzX1hhq71isintPZjvp1wB3UQRhqQLd1Wmg8S41-FYcogbR2GUdzH6utB2bZK-wz3k0jL5pBsk_waA08h6wyzfRoU5BQRhWb9umI61mF4FOhW6UoNX6NsNzdi8Giqwskb_uv_yNG1Tvdv1Ima0f8A9uw2RIjLs1L0mVa7JHhawhT6vgLixkNqfQ-n7QeADWygm9M7Yw3wKV4GSeNy4daLK8k-DWwoxkURfKrcbU5azN38bcDuDlLXpwn6faiVzMNmyu6No3b_jp4tdfOd5VZKzRyNWWHSD84Z58GQEnS1UaBgaIP1_VSgY1__Bf7PWCv0qVgYKgLaDv_TiOhC4n-wRj6tKgbWnzcjx6R9pSHYvtP-9lE1cc7__Rceuw07HZzeUs2vsTVmwFThVJ7jJDo4ixW5Ceh-WevI0CYO3KcPGS91maeQmJglwIRbzjZ7GdBLklxAEMVDM5fDUqPssInVScOSTueAXaieOwhIelszsCsYK1bst-hgdHdNmJyYPjRFkXnagb8oftbOaePibhV2zi7o6f4XMn_4UHnS1rvo8xVUoN9s0vbPBkFxzgifn_cf-kQlXzj-iZZ56IJRcs5v8qZyDFjjOzzjX86ST22Mn4ZcDeySRMOPIglvNrCIxDNj4YCoGvU-FzrzsHhm3euR0b7-fwvM7A0xD3i-GvlfDlZtolHRMSit2XSdtsBZeVN4P4KIeeZ58OdliTwKjSp8cXC2OUe-_q6K9hccfwcg4xYY9nEw2iPVp6rqDF0EgWlGimVIhPlvKsV7evROs9aVmTeLni-u6fgt0KOjaGeHmGS8beEPUwHCclUk2SisJZvCyOPswoT00HJGqc6EVYNGt9_gK5qKHuM32MEmEls2ZHMg7kvruTEuHkSahtqrMykrV_77q0xgbJbMHemc4u0rpK8Qgg3TloxHWnBHxZAKhQwb7TYg2_crEj3rY2ninenA4iO6Yv0Rhu_UmI9NANvRWPzJREhVFS7RMwscG2Ep46ezHWO2b2QtzyBIaUF6rvdeTSzPwmrUX_qNr-ZQMkuwhBoAqt_nK4KY6du6yPBF1mbP3RhZoOoB1R-yHLoLxIEM0b5aSInfikgqDpAg7YC9bXGbO49jdXjFoovtNtHUciDHufC_oNizbAFSM67xrDKwHdp0VK0zPiptJrz39bC8Q",
  "ciphertext": "F1VkyLk154-wLPTIPKKZWBlbhot9YyF-_kHyXnRTsr53qgJwE4SqSmz0GdhFOTch0budMwlZuLCoqjBa2FEnjGdPCbCsKC5MVlRUvFUBxDS3FI8NBF_R3Cj87Xia-luFwrSV8brW3p6IDobEmJVGKhHWax7gKZMc-nvUkfG88qcUwGH2ltGQUfrjoNP2tMYdtxdwhyvtx7qCoDJnv176Vp-ySAgjnzSZhGSe9_SPooqtSX86fuauADVauOVVTHYJlzUv8Pb0bBgrA2PKhuEd9YvCTHTkCTrczJFmQJit_KQ2k50e4qo88KuIMVdYHeAPzyLwyRCYyq_2o5F5SjxlvCqsJ-XixQog5EumMz8zVSnUmvAQzCgGiolNOKro8_Dypg"
}
Figure 2: HPKE-8 Flattened JWE JSON Serialization 
eyJhbGciOiJIUEtFLTgiLCJraWQiOiJEbU9XUWktVndyalpXak82bVFRV2R2M0NKX3Y5a19QSDN2UzdTMHhvYWg4In0.dfD8NhCXNZzcHEudD-fYyOnARkPpCU85i9xWYK8FCQlxF38Cvzxi7vf5lv2zicOhiJPBtapFfajU4QSVQ-xpN47BG8IKdroWUVGg964RgmxYHjetCi-DlbmeFCVaPlLieycvxuEdWmmUaL2g6lWmc8bqSo27tatK8ZLxqZKBrGGAXGVpdtP1MgjxKYpd12o-e7Lu_tjmYA6z-ws8LvR6StoNZD5oOmuAUwJvlISQ_LIz5y0A1uETSaKRyvyHORFRr7PiNRA_kSv8zGsUQFKdKCVXiVawylU20YSbBmw5tUeiOEfOp7McsHByWlVos75k2oQzd_HB6ymPaCp2Yo8CpaWyklb7YBup15Csy1bEgawr2pGdohxPMTsa3SmHOF8a4hYVqUjxK-8V-2Tshm9ZdibmhYqtqDuYW2EnRVTWKTrIXr7YBF5WTaxAXhMg-8txtcMEYA7kJwBSSU39uMvBZE1wS1N-rYwCUaVecjWeXRWNmpO-HsxIliUy5cRbpWCKUhTymGHxJOX5jUsCPzDWQvDXRBLDT_-JsgSgO8UZXic8HajfhBTxj-zdi6vT6v-uYi9wAvHlp7yL-rBlKLGvI8jdGj0Y4krfYtaeaKa2ZI3lOLk6IUZGKqn5x1NrZxZzTKbTI47_AZyQcTnuKgcHk7Oku_Nf26nBumWqqz4y4gRVZRPRi0Z0eNsld19sYonzlHWJM2oYu6vmThmW8uyzXjZr0ABjAL1X9pLxU2IMsgjhID3pauc8J4MazDd1uLuzygBAb1ztDDX3J2YtBGmONxzieP1G4IAZVAtQcPCuMxk_RWhGK1j9l-nQMgjP0DKSBxVGLutrf9zOA-Myvf8lAGZQGv2QQKymc-R1Gq4uobZGHA92u-8hm3hAVbFunA8pnQWWJVkRiGckO7ssS-d6mfmgNKoyp8khnprai8g30vFRIoVgijxWCXdkkSDsM-aEEkDfhde1vZxNQpbB9qld6VjJfVVlpfEkjbjE_RN9sjMGqInAlsxBVFcJQBMTNb1N_3YVuB7l_TKBt9fSdURg13jH8wP0jKybWqyUNIQYbav9JVT_o-GfJJKw-CtnXNyqDz0INKFfJHT8psTn6CZhsjGVtdR7sLM-ZYblnc6QQwey-mAf5Et7-DDlrRPTPv7yoB6o6J6cJwtuyhhu-HFxCmRZIpSYMRe8lIRrPUXk3MRmcQWmZf5emPEbEPsEAL0UeT9XFrHFqeIZvGgzpmbJgJn5BSUarqCcXWX6uAcAdat1nabT7nAHYPXNnxG6-CCwSjwvrvVSdNmSJq2fkwOjo6F1kz3smAUcUhjW7W7iC443oDgY3X_uYbhYSZUXB0XtqCuWSo8ImoeMxfddgxvdwmfFaHiNlqvSVCkewAcL9Mje1lyagnGtLCqO9lJ2uivnJCyNlPB9A7aDqpGt9DG1UnmHNHkaj7bqKFD265HJufoEmNG2eP9YnzRTEVkbYSzmvGH_pKXqmTv8HhSSTvWvrpKNSxLwbp-IAKtyexCuyjcg4AnQRIqvyh6sMM2qU8ERhA..I440XaEekuepH9Bw77viw84dJoqNozKkTAXuWGcuc0MeTfHXuEnixKkMljPX8DqM0hLIx7fq_bsM_A-HA3i3erkcMHPL7GKo7Tvgaa3GvHr6Iq6mb0iED4k4_TudWz8dW9762L2jinjdK-aTy19T2bDUr8Em2Wl8evBRtWaRbZi-LZrM0cuocqHep2A_ghhUVSv-sWrLuYmwvW3tXLGGtqpHnUleG0rYOJozw8Z0Ovs4tf9wPvr-sOg5g99XuoUKtlADhJEy2GtX7BYFC5XHICt6zcKipt1X9xEDsRh-EgSIcYg1oaXpFzsO-CSfzfSPVhwU5bZIKdAF3rpAjNr4gMPsAPY2IKviVQoioDCf_1xyWHoGw7P3EbX8_LmzufHUoA.
Figure 3: HPKE-8 JWE Compact Serialization

A.2. HPKE-8-KE 

{
  "kty": "AKP",
  "alg": "HPKE-8-KE",
  "kid": "clBPky-tElQGRa8AQ1MYfMPvfqmhOs_5lIejOuqAdps",
  "pub": "pxQRXrRJLke8BMBXa1FT74gM9fq71fEwRPRndVsmsYAMU6llEnJaeKAagjxk44yl9Psn7YBn3tVXXLVrqIxyWhGsP2pmH4Y2eogBaRMGBfQy-TM_RzdFE-hKLHqHPmqP_PZES2s6O9tBkvk7D6fKZKiBDSKrvWgrKCIo1DccgfHEayxCtex1w1ZjVweIZWtVA3V_JdijzobGiSU0dzqyjVBBCQVcWiSFLLuX6rFtiPpsa3SlavpKHaRTIZx_5ocCO1LBAKq4jwew4jxnhRujX4VcaOE2MQQ3FUmT6UgMpWSfymJNBOqwN3uU3EO_ktgMPwdfrRVihSgirkiV7BhSW9uN95OTigiJIiedxPV6asK27cCcPhN0lJQOynlah8BjySYKwdMRHyxVVhGDmnJ36veTEDoboBhq5iAkcqwed7O-KwC09XcVciegq-tYI2NWMOkBdXE_W2qvvPIkJpOYtKAztpUcxhBBPitRGQcdz-wD4nik2DFk82sfDNpC_lV_XWYR3KVwiBix2tCB3tw-j9loE3AaxGefsyl0PPQsFGu2i5qutBlUclRUhMUkiGcyEnx5S0xNYzyuM-lAa3WpNzlEc_SoqmKvobZp0pi-ExYnpIQJ7nPJFNXJ9ig3kvpNCxnKlEwsP5w91SbOcLOBQ5dIq-moh4kK9ZCry_JkAmmAxhu9kGCughacCPaUqgZrigO9bQHHw0giX2EB5hA-r6VxzMwYJcox9SxD0tJVsAMhCUGhGuS5wodrPhay-ss78AMZiXm3D3mDe-sA0VVRLaN3HgmZw-kud8su7bKh9zYec4iHaygQq2ySGoeOKoGesVK77fiLlWaYLNtqEmywBblQlkZbOIUmcVmsTwd1yZG-rPIka_eJ9gAE4Te4XgExooaJI4LAdaif1stG-lEZF8RmNlmvm4wdAMZQAqPPLiOwkVAhshMUfavMeViGedgk57y3JNpgqQuX-sEI5NmNMFW47wR3AesCpuuq_Skqj8EdeWWaIwh-L8iDYCc7N-tLhNwgJOpnI2pH-CpgVShigKi6brIjB4QEV-JtRzKFZ_ZF0wM9GYTNsBM7dXlxPUUVjLCyWFWYScRdwHypH_deyvaEjny-0DgpOuR5pxBWtFGEsoAQJBmPZFumwYB5dZkyBRJrQPUENMNw0eZ_1yql1oFIdTQCQgEln9BFfCPB6MCX8kZknPovhJmq74BALPWaINeZhniI48FGf8tz8VdJ11Mu7qxrNiUHNApTMcke3Aw2qKl-NtFeR8Ou6fqQH0d2ShV-GvCcuxjKfUdNU1y5zYhlu6ZZwvkZ39jKl-t7Eyw6rAEnUfWA2hEXXMaDqBVRYvqwhiM0nboODhWUJUW8OEpBp9eI3eel7tRFViiZQ7KsZmUBVyVfGJQvh7DM51VAvUUSi_xPQzsz--yWJ3DFmYWF6eMQk7FdUXu7HmFxMfuNNGHMypx8S9RqfCiI9OfOeqwVSaa2MAd-b2cgDAo8qVeCGcMVU9FRwrUscVeltcJI42sZiaoXFPUlyAKncyajZ6gZhFNexIDWiSCp4L54nM948L-KcoFnZwHsueAjiJwE9dcy6kUtyQ6v0_OxWb8OuM04u96GtOld8wVIcB7QE2fd7g9XTCdShgpdmMgNnGKrJM0A2Rbtmnn-gdxGbyArJA",
  "priv": "biUK5NqJzXzWEAN0F2zzkrEr9Rp_QX55is_j7VYuHCQ"
}
Figure 4: HPKE-8-KE Private JWK 
{
  "protected": "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",
  "aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc",
  "iv": "0aukXUnpQczTtS5n",
  "ciphertext": "lbv67n97TIcLw6LArd7QspB-pE5HLGM42rk89Lsp5G8t8CS57V9StRYiRAJekaf4wOSNoYk8AYGsazhkQtyXIqDk3tmrOjffkR06NB8rD1L-i3XFnlP1oiF31qCiKeChvLuQE_KXUTAI84MHxQj4082y-l3y0BrE4J9lkz6LrxbUs-i9q6mfqU4Gp3pmr08OI5eOtXZgGUSZWaKbpL9hd6G8s1TOrCG_HN_I41Z24m-r_O4KvH3DOEXdPOQqTHHAwistJM6acBhwkq3GA2thKpIRxVcB9LJCglEiNPud_pxG4dbIYFHSLJkeDsAeuUsFFhWuVFvttbQinngUnW4yIjSVmxCXEvLiQX3wcWBgSMQe",
  "tag": "a0gDQpq6LklNWWPGgpXHmA",
  "encrypted_key": "RoY6etXCUcUlPSVvM56k3dkyqgKVsyu808d0z8R0fnyXM0PpegK-JIjZLub_8NK6"
}
Figure 5: HPKE-8-KE Flattened JWE JSON Serialization 
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.wrUWvWJcDAucAZmzM9DFJ0nnzpqbg1RbkXH2YdRH71s18RtgNsAI8HoEL5Tl4FZC.5Pe6qU0dQKkv_-vH.cHWwkbsSVMRMfugjYotDWfkQ5cweOEtqkCGSBqVirv43YyNkw07MXu42at2g1O16L_Dk-8jiekCV1fH2Iqj1FvI_x8b63nw5UGH0baXMFngzdTHH1xWleIZJa68oXeSZSBPMNREqvpG3qUuHEPa7PP7JLBGK7HqVu8B7-uFo-NOzHqxzLWrjy_XDEPicYcbrrKKHuYkntKJqU_iLHUGQgHzXMRLX2hZEawHAdOi7O--19jFkuYBktgs-cggvSkFgtOesIs4C90pLiQ31bVx91PbsyWSc3Xb7M4DYQayWqL5Qaw-gZtGSJaOIBCQXexvK14sPSkccue2Czi1BDMDPv47GyuBSBSubSJxPGoPHvbd1.XSzi1NNTvTIEN5fkULexvg
Figure 6: HPKE-8-KE JWE Compact Serialization

A.3. HPKE-9 

{
  "kty": "AKP",
  "alg": "HPKE-9",
  "kid": "eb7WHB9a-KjAiddCtfLZx0_Y0LmShdR_ogy2FPlsd9E",
  "pub": "dovE-nonYvV3JQQ9Q3eSbtIvjjBAY2ivhZlHdEoNxIsawjsrJWG-v6VW4uGeZVcmB4EHe_ePHctfr3xDrlt4VOgYjYyOCGVgm6syKQLF4qwVzoJCBkCI3LJxK4hYVzHJ6oekQ-uijuEeJ6un6iEKSzWJ6tMyltG5h8WlWWmQnPgkt8FHz5ohoKpfhEKsLgRrNpjBcMhPNbOF60K5wPRL-VhQjbxlQQtomeQCAAGLQwKL8lEF1umjwLe7MdlSwsZ9ixOcHwxuNRKwJ2a7zwWG68C4V4TLVSiKC7I5gRC6mZY1gjFUcoCFAdg1sdkZUviLMlwizIoTpzIITZSo5upD9QBrMsTDIEo19GWSACIsZhK2rgEoekZ-4UZcd3qazsZgMSY57CZqqfhXgEBqv6a9mntvLRVXM0Ro12B_wtdJvNZl-fFSBTMkLoRPQeXKB_Vo6mYul1CRKEm37hpMJagk-aZFEMlYSSVoYMmPyEMExyY9xkMCvcESntxljcAHqtyO94w-Wjq33vOgvDFkv6yu-cKlg-m4NeSNcaQAQpQE78DGTdUovEhNOJdB9TCghNUfBtUMVLiwlKaoEBE2aGovjua1sjcPR5G7ADVo6POcwlKujUZBBBpqJiefHgg2BEe9z0E0CTyWprsAnUeMrAihblMK2UJ2xxKIQgF1sXNEPRUJu7Nh4roZ6zxSaDM71fJfyTNSL9lEZAOxMpcv64iWwmXDzuwHy-C6P7IlhZRRhQaa4htsOjpQ9mymL4UAsii21MHI6kOD0imFqWeceNcdRPhnTJcdW4NUnOuPTRi6yZB5RdFqBosTTGZrP6sMs0ANCUdimtWo5sayTEMJdXSPLmYrV8q2NuZmk2WAxBszxGUfCXxWGTRME7laBNkyY4yyWcAOnCavJIObfYC35zSIDRgYxjoZIoyUiEYDj1jBXqVRXBkbtPyU1FZMsxiynQFi0RoA9MZoFDRUqdNaJLOabYqKzCsjRicCsSoz8qSLNaeIeNRrslhGEaEOhvOzygBUbvcwtbyB8XUlZcYJnbUvrYZPwgbLbVqCnPgjfemvxOGXmIHKabB-fla82QAXSPDE4Siw-_UFfrMQPcNl49ethPC_WDS4BkrMZfsBFBGHVYURIyNKa-dwcpgTXnBSxXq0-vFk2qg1rsQRIOpk5URLySdDtcgpZckNuXMB4QZi3EM2I4UpKJVFJ-VmbridVuUyoIIaDhs1PGOCZxFX3bdCgXW7DrGg89HI4xW1e6oG6ETMDWJ79UGZFsDIY3NpKdOzPxZB25KC62ysoUQAAeW04hJoh1ufxiss4civNlQhXzOx5aOm6kVRjBsBF0YvEwioa3QND8pqQaGuPJmPSyk1_BHI7ScPBNfCiWlWjgO2zYh5rSEKO2sRJ3kkaCcle9FbpyMU-OdjccQ8g4KFYXdH4ZdDP3g8LBLP0YRnOwBz_PgcIPQbesiH6PuHK3XJcryso1U41OZVPtyyokFBiOt_wky9gxWbkqxvnvJz3xlbCrqbfKQqWbtROViI6DIksDa0raQbC9sIuc5ihVwkzjQci_PmQLrnryrezp0cRcCuXGQEhC58adU99n3Ix3tXYRIQ9MH_IuXXZaWhtzCtm4yDSFZ7r39u2q4DsVnMXRDFRPeumDvQIiKi_OVWXPZXiwnPVA",
  "priv": "LNSniTzUEi-OzELspR9-P9T9Bs9wSUEEO8Xv8keGJ5g"
}
Figure 7: HPKE-9 Private JWK 
{
  "protected": "eyJhbGciOiJIUEtFLTkiLCJraWQiOiJlYjdXSEI5YS1LakFpZGRDdGZMWngwX1kwTG1TaGRSX29neTJGUGxzZDlFIn0",
  "aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc",
  "encrypted_key": "4DHXgJP8raAFh9EiAZ6Hdd7sfGTjuRGq_bcY0ET5N7BGalXDbqUP0rPVFX3deVdrVUC6JqZ-Q9vZc_KAxaxI2t2mlmwKWwUZHX-9sd83VgnGg7exhgLUSSwp5O-FyEKgBAfrYD-DtknEnCO8IREPJj9JqIYREieUKzjHdyergncqHcb3zngZvJW3QsPpTriFelzL_9peB_PhPQonqzaBxCSE2pNq-VPjL-vsVzdBccEUezHiJ1PI0hGmAdrBh6YChO_VpHVyhytz_5oDeHwD1KJqiuVLXgLQaXHv4E4kJX-lr_GnoWLwGWSjvMftraxYTWnZ0OtH7IaD59UQmVRoI2zpNEl0v3y9BAtwVE8PdoUhr5dhJSSc3lxGXekvuU3LT0r6J_KCvqooP5Yr3TBbIRFB0cTH80zR9ASYtb_PVoEILt2dZu4jiPEi-YVJQJ9KH_zL4THFbm0IUnhwiEOjq3RfsSXdkNER0DaoT11WoxvB8s631EhpiBwjobmtxb3a5JQRKog-hpBHFQnhcS6bgvl8D5arJxRiHPdowVEW3PFWSGTWvExfegh43h1tlmosFc3U8vHRBMQ4zjQ2xnL8QGpFQ55b6aUqSD2KU4WEDf2oLqXJwbA_JEGAW9y0Dbwm7jvN-0BVhk-ngvK5c59kmkGRWzMIlS5YXIPCxQ_uo8Q0wavp6R4C7NNJH6qow-JMFlJ4eW4JA1eL_rkEIZAFhn4z9ll7y69gIS5c-uwvzI14aYdXhDOvhhozsMMNnywTpmG99CIcciuVP4uSsceYoIhjfbH5RVJHvtsLcWj39Ht1MyM_ORHftcHqCPN4ukGOk0s1o1t4MmQrfUt0mS8exA8WjKKVJ9zsnMs8kqmtA6p0TBydh5QKDZ0CQdcxAS1JlLwWfcYa8VNJ7vtQZxOuUUJFeQ_Tw_qlj8rnwmVF0eVVgBLGuNqRT191FWcZT6POYkyWa7gZ5oLpEv2xFmZvi3KDfOQDLMSWizFJUnCyNsZmnemTjQ0CbQsf5piwVcHDrWnPyjTuw6S2mpQA2NgMoJqzYjt3opMpYVDDKYD47HEq5Wt82LTcZ3FXuqxL-kfzUH_XnH10sNnTIfWtexdqySDwvvp6n9lEN4p_uzlwoibuLn55zyrAxXirhRHHFb7vByaGzX2BFtdjXIxI-NE8XJCZFBy9KysXhoAInk46LCJ1H6WUzJjeq9a2rKsHYPiu15FfX_EADQTS6y-ewKQo-cJE8xGbZpi152oRKUvIUMgoaWCDHnTNfVOcARHkMoPoBwSWMoJ6DVUknIITLYP4bZXN8sFS1CBGq3M40FWAVwTkPMbRa8rZKJEWKcfuV2g04tp180yaXK6EJO1RWTwfnSlB1DCEWEJecO3IHUBIy5i8G0Fsr2XLQFLHBVgjX0gpdi6suA0vU17m64lic-Rijn0Bd8h1Gpf3GeQzCFoUZgwEeA6m-NJO8sGYqgtJx1B2OwBn1odRBAdXa3-f4vP-96rtM9TsRVU0qj6YDoVQ6SmXV3TCqbKGRerxOc-hujo66w",
  "ciphertext": "SM5aJqXd-wXt8OwqJtfBHxhKj1zbZQ4X8RGFv6LOuqxXrETo1hEAuOSDmYuv_QzSXN6YUfQj6rQ9C9Q2o2-9-QfWTU0g--EV9fZ-RhUlEWkHeOOWEBQXiPHQ-qBbwyuMRs_wKma-NYYfnEmby7mnpEKb1QTjmQ_sEJZ4fVDyP1AlJrH9VcVgMvkcQI5Dj9HHNAUjQCXc6K9KK86eWo62FRC8J62_c9IP9MDf5dvpbHf_RHZmHusV8cqgwgKCU84lVpacruiiBdvAS1YDpR6fVrcXY55E--zSL0Yg0wCLIQVSFBESrdFdpBO9Gn7mCVLgu1biJmMNcX2tpFdkb3jOAqpIMoVZrBrHsb3Xam2TNqV9EW04s9pCortCBKfQEeFtLw"
}
Figure 8: HPKE-9 Flattened JWE JSON Serialization 
eyJhbGciOiJIUEtFLTkiLCJraWQiOiJlYjdXSEI5YS1LakFpZGRDdGZMWngwX1kwTG1TaGRSX29neTJGUGxzZDlFIn0.YixiKg5xesnjE6mnMa3ijN9qVtFF0edAZUpJjibK6VGD7pmsmqsHPrAtvdyVCP6qx5nmk7WC4RT1RcHvHZ25wfqkLFSaK8y1zp4n0mLBnd71rv5X1064_8kzoLFgcQr9uJHkV4PHbI8hBp8hxydgAf2uDw4BCj8M16PzW2pTPg9KQkmRUDfyB_PopArYr0DtXgecstqypcfC-UuIRWK-17bVUCvMRME4kzcc_u3EO_MrT3uCZDYdPzQsvXDCnT9GP4ReX-BF_wzSH_oxSC2lvcB7ykCXO64i0jROIsKMIT5qa-D8BUCXBeEdZ9KUf1sQnKPyrzooLmwKblwt7MU4_KGPWug_tETJUlNze6NRqSsAPTv8ySUQfhWmQxrwupI1vuI8ZK2kO35g9lfCxQ5XREmvlKQHBWpB82cCb5HQvGlKHi9LVnQEiuP9-31bZrr7EKwSu9LC7BiVeXMGkyVtPhad_q1VS6N3NF8gjsvyl56U34ze4dpqDQdb-rWMev9AQZAF4gTEBh_kx0rnqxG5otBlH_7zJpqUpeBNKVdZLpnfE9Yqo44qKcQxqgMxAYCCKET3Lb_rr_gJZeQ5Uef2qggTQmGv2zDvyxjJVK1g2joTxnlIbXW6pev2jVCvg3S0HrPdbdtL5vK2oL5_18_PxKF-39jAJdrX0AC130lj1dInHB76WQuCWHbt8gAcF4CzELWe4lTRlV0Ft3afXnntUSr_JLJn67QzDTwnfEI3Kj1q05ttGETSiaOkOiQ4TujC9koDebM9y1jrnr-pvrLjmX75zC79KrbLvigg0AzihmbnFdR58IQSZ3Uxja7lxjVOUe1QOOs0xk8_Mn1rgu9w8SJHfcbncl6uufEb0odf2emPyRoZZ5ONpIqtd2pLeDiOFvFeieM7qeA23yDFOmomJ77teVmuKG-tY4QCi15P9bHEVIbICryTRIKofklOS97CgzoWGqSbvzeVb4SdY0qs-Gtk591YmqZsHlpz0ITF7yi0taLI47Mrfe1hNz2-lEZ9iQWOsCi1xixOnkQaAexP8HLbJkC_dnxKI057unWoFgJ6poMtBem0663VgEafx7E741e7aiWz73B4585256pthNoUD1NatoIJS93pgsGodHFDgTMuGLbmF2FRjvx2jNnywSxxTr4XMxkaAJyJiUFYPTXh9sSRBYfn5QfqKzKqjBjjFqdmVrqAzBzUAkGbjAKYL2ao_zUbVI3sKoeB2uGc8Svf4TUqJqGcyLSA0gS7UTFMicOqkO0Sour7SiOkYb9s6i-2S99AFN7JwpI2UWe9Xy96_sBC9YdIhOS3RhIOPQ-lw6ULUFMCwjLNyk4dV0-9YvaE3DCoh3PQC8xqG6-JKNgLaQXaaw5YBCV3F_La2IXrDAbw1kIsHz-7D68YO-Cxl8r4Vg58imG0iWC7hB63cDuML3HtmXsJWev-W1UfYZIEMzXf4aaKpP24OV_XM_eFj4nqG9GUr563HNATC_xpIR5yAAyLPXBoWhqIDuk4k8CHlEk_qMwLE8KwLur6e9KxdA..qJ18Vn7_NeIcXfUx8ghZFY9cTCOR04Fr0JfY4-tQym0Jyc62ywkQDwu8HeaLowk_1WChzVQmO_BR75cHZVW-wooVYVDwdZykKw6f10yK-ubk_G541JinHeXx2yDEYW__TnXMpLH4a9PMFJWgrwGMoK_z6LSNW2ZTlaQf2sYVnBYPX4ygdhUsGiLgJfvPP48ZuH-QR3vk-dQY35uFgKIyXJgxUE9KQJjOcWjqZM0-1sup3OKBQMl7jBPRhmp_Xljcg50lr_Y7VXcttlduMh2h9HLfZlzFmFoBPzwJqaDgKusd4SBT2kCfp3kMS67C7FS_SxIVBtEMvCQunsR7f8ci7dV5l92lwwKArKZ1aPMgnTbieHg45De4DvF5P6OfJXuW7w.
Figure 9: HPKE-9 JWE Compact Serialization

A.4. HPKE-9-KE 

{
  "kty": "AKP",
  "alg": "HPKE-9-KE",
  "kid": "-V9VDorHU5_DOFXFxSSNoQvhWMat3LtsFnzd3BSObnk",
  "pub": "_VGNHTKXEdAnfXdDRfOCcEQtrdphLmbIcKp2oBZbVvCU6ptwNgJVBiodmypvByrDHShkqYkng6CD2YUHdBMdYGvFKNwNS7V5fnI3fYpVvemlaanFmAN_7eEbhzSuf_B-J_k7ahilfdMBO2BUEcpkmhRWr5gVkveyv3uksoJIAbMy4CkEgEFuEBsLOlHLMyxxmCau4GBa6uWqPBkCVygnoBCBNChquUymfDQoA5MEBwuMiruyl8Jp2QmsUHgqMSd34Pm0I2dhEYsXwUihaqUhPqbPRSfA8oNNpwc0p7MwRmx2M0iOXZU9ClU2iqNSYHEHXkZ6iAm3R8R68BlXL4BHJnglpSiHi4YQovuUGeOBCotesMU_ALXKP_NZ5Vm88dhSLfernRjD53UPSUvL8hvLgcKM7KJmhmUrlUQOcDjBlSpsYpNwaJVCunSW_aI47Dlyr9CPGWCX2nsHkyag38dq1nQuFolJIkogDHmQakZ5E8BYA-liO6kYyyi62llUa7sAN7osTIA_svhkW7LH_tyOqKbFsDGB3XmHY0VxzsNo3bQeKFQ7DwVxBXk2KSJq-EMzKgsVLgq7cDdlneQQt8LCzYk8J0VD0FlMZmu6J2UnZaCk4naY8YS0DcLK3wcgThGW-rZIwwpKXJrMkdGAn0cQyEi5JDJX5UOI_to4dgdWXWeA0pudbrVZzXZeuBmIPPgiDbVsUONdcDS8wijNjSQ5tIPJtPp9nHl4erY5feh7J_imp7a1HVFyLwyyeDUwoyN6RXZowlMWVFCvmaUNF_tc4rg2eJaugOhuVxEiWRygJjoow5ynQIcrHJrPVEdJvNkRumpJYIZ-oCSGRtBwbRE38ylM6vckFHtbLNW8nbmWDsyhe7KznhoTE4V1znlvs1pzWNWut0ElsOuoACnDg7OvcoMxp7pMK7KxLNpn-HOKMvswUMXJ03fJDUc34jtoIVfGt7yALYAW_gNg-MypzDtEJ0C6ezdPvdEcbEdyfFksVjAjL5MJorYLSvx1uAFlMSors0Zi-oWSn2as3iAP7QclUAJBoGsVU1lyGFsHxiKQnSw0VhhMy5pM4dVBKuunLBpe77mAW0AEgomO-BCJWIaZmByeiRaU-WQ8rDO21Zh15jksGPVMI3CGl0IJBWZjnNJJwzPA4Dhk8yXLZORlG8nGxCxaDVWTBtFlRMsB0aMwC6LJ66lkevZCPise0Ld4CtDEhKkWPRipHckb1bg7zUZnQDwO4wx3kRNzPbqbG5DGjwCl55ZC_7EECKOIqzWNqBmcS0tMHxJ2TXl_NPybc1AxQYeixyd8NOsQtwCwcKjPAbw5FMK86PwprFEzpqwi83taWhV1u3puLTdPW1BuhpN_XHQEg-KeOzuu1URVngllB1ge9otW3JNupUCjBXWislV8gfqzBUcPJ4SSfgy7goJF0tRUSEcdNhNagSRbo-sxtmU9oRwka_LB6nh9o1WldYwM4UWs4fIl64GDw3l4WXdAM7A7-rC6TIfKM7BmC6OH6Sp_SiBSTftRYtIUQboSl9eFnIjpJ-y3Ki0cd1O--A5qjebaWE2MKc0q7oNaaLuWsowEMugnHM1bm6KEdXJJeWa7TAC3a78t488s5-VCvW09vWbER_SfjU2Ch_nxrtt6nnHlNmIZoJMeZQzbIQnO-glZzw",
  "priv": "65u2v_r9I_dK7QCtjTBmMhQjytdcc6kAqNRSbyCGj5Y"
}
Figure 10: HPKE-9-KE Private JWK 
{
  "protected": "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",
  "aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc",
  "iv": "XYg8K00xhq2EnFx2",
  "ciphertext": "vvQX6OAD5uuiyTmzu2ZXoPBRF86Se4Yw4hDVp9lDfIO_rFxce_tR2UHc2yeLFxHgg0JQs7DbB2ahWrmqFQa4Faowvd4vy1FbDQophz8WDHaHq7h43hjv8h3yZJDQtVIbRQvqMPsUivoJ6J6W02r3bBtEjMflMvxwBuZNs1uMbomx3YN9D6y6Ze8VigP78Uv1Xy4K6R_wd6PVW8AJaPfTBV1sMWbCS2enqNtQms8qfDk_7sUhQyZvawPRxmlQE8FbSDoXfh7bA9UfBcoKKB-ni02MlTRs1DVWT0JttYEreqpx3cccIBTJ2gOSy-k9ZepJipmW2-tPPok759Sc6LqrxJgqJ9rRhNIWIKRnPkLElSNp",
  "tag": "rZzBJn-V7ZmPUOYBhPR0wQ",
  "encrypted_key": "8doxqTRQHU33CXcWOtIr2b7xKX_xA0-WYbRbtxlHcVsX6-LlV0InnWJkwjInsymv"
}
Figure 11: HPKE-9-KE Flattened JWE JSON Serialization 
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.jfm7zFDOXJ4AZ0rXCJqFGZWfrMcZr-MjgiM8b3Domnl-_wRnCdj06K8QoVBteE1y.Zla_65DmP-jTbGfV.MhIsLHQU9365GD_dX_oIqQpdi6ES14T0FDUEThCrM6hGaa9vjdLHZ9TqX6Bh9eOaqwlwpqzD4FArTJnA9omKm-qnS74c6--ZThkTbI2eLQ1KM47G_0rU3BY2bebARwDvGEihxoAgzoLaHFB0RcHDg2b1Q_jSTNzZHSMfcedZ6Tmg45aJnZ8CT5VkRUDIegaLODcC3YlybloLz0jAuwR8lYLG-_HZPIWRsGvUaP1NMm_UKw_htNajAh4c_nSkcO6oyfuy7a9xphy6AY5lj6LIPNHUolwtVlDuKkXiy4OFn4aNnJrhtLJtjYhrQiOWGl-7CxwffIr_G1L669V1li27qpuo84wzWdvYmuuxEWZmaIKP.jRIy4Dxq-zZ3w2ooEmPHpQ
Figure 12: HPKE-9-KE JWE Compact Serialization

A.5. HPKE-10 

{
  "kty": "AKP",
  "alg": "HPKE-10",
  "kid": "a6S3CFflyR--3T_COOiiWl-QogGvjJdBHlYjUvSgY_U",
  "pub": "xklAICae0qgkKfVvsRSeBudZynYNfEZpzrkcuncC-6JezFhrj2sfxxECQKy6DtFIgdEEpKqdWsa1dTaqdhGfZhoUL4wO8RN5GAJhUUFJcVgmxTaDUWi96ZwOPICAIfgUphuy1hxxWESiw1uSjPkcd3tjeDOdONMC3dAg8sR1cWxrv4OKRKipQHqAJdxnT3NxF2AYShYT2tmy6SBKoKBkewWyE2R7CughGVG3KjEau8S-EJIWRcxMxsim92AJMLhgYXOPZTrLgrAPrnFrggIgKAnD3HpgJZtUriOcf0p3m6N_g6NdyRKuoTDIKkjDvNQE1_dVf2Qa98Fy41m-E9Zi7Em7tlIwMuKpKJt8MJbGZ8BhtoQ0UkiLc2FSwdJeNosem2kJfet4LdxXBjpgkNvNtBa_39ACiIq5DHI9E9iaKrwIFAGq27sOjNKM6mSNTxpzxrs25lOupXV8oDkTP9qOd_ObuvYoWyGqYkWFeQkrDqMnI-YYvrm6gNOdgaA2L8wSeZLLkSG0z5U__lWHJXW-tttSjyczVQpEsqcHzsgIYIqod3yzpdlekqo-9aanlkCOt8WSH7jBCvcQ1zrJOEss2LzOKUeX0zG7tTgGf1hrMaweTrlAZYtDoiCtJqAgUPQtm7gFx_uUzRGLyKthvpEnVKUQ6mBYJoa8c6GGRZQTWUMDA6fHhbNmPIEIekqFqezGJdtXuHHF9-QFaCyi1ddPcZLDmqI-50AcpIV5U9hTWtqegqfGBhvJZsK2YUJABDNm1zmPILibzhCby2DNEkUriEOosNeofKKfCrXCJuR8_7ueGbpnpueTp5mUdOkoDkyPAQp2t7qOrNVyBelub8UjqDwpKREi2LuE9hOqNNIFWzpvFly81PrPxboi2WSPYOJweAUGR-K1BAJSKbWS6tGx-ehepjYCvbNhJ-N1_dlVlBIoTtmWDttjUNlDz2hxY8TNcnymsei3tPG74gadWosHKXai0DiexVIGzLMjeGwRI2CkxSe-sskaF9hx9DIiD8lEpjZlyZlgbVxpghdjS0khX5Eb7JF61cdrqOyJ2ATHSSRnoDPOLozDsNevIuCiXsO_i5wfxfdbSvmveqSD4qViUTEm8XErc4Y_OuU2iiATb2wetOWKR1YUE7A9wZpfKMQSDtRzXovO34wWUjOm4kZAMKdXr3nE4NMHYdjJ_oAP-SxcibSC2OuqfEliFat-qgsZB8mxOvp7maKy1BlCotUneLMclfXPnhJbUUofsSyag-tFvyo-0uiM-JbFhLvOPgkOqauN52aJaksY9ktpbjMF32Ed6BohCaR9qeZ_loE_jIJCH4RUhjNxx3wlaEmtlwSZPByS2ix9l_pvGKIKBgeWext1dSB-MZYRLFyzIeOOONQVMpSaNMKz4ietseBfNuKk3uOwDkOlMOUy2dMQ7ruHleOv5gSs6JO70oqMiDEJGfxx84d2ytJ2ASk5GSc820fHwGsaHRA3dUspLWoqVeq7EKcsxKATdAdxbXB4Uosl-TWcZ0p36Kg6kql6oYk_tCN4BJhu0O3zQac4MKj5_8wjrW_KbAj9DJgzv3MiafR2X9-FRLC7_0DssrAwTlMIxRr-olVTpOIF26zl9mShTY3ZEA",
  "priv": "uCM4b1UrxQIuPvS-wIq9I4-kehldr520pg0W7jE0laU"
}
Figure 13: HPKE-10 Private JWK 
{
  "protected": "eyJhbGciOiJIUEtFLTEwIiwia2lkIjoiYTZTM0NGZmx5Ui0tM1RfQ09PaWlXbC1Rb2dHdmpKZEJIbFlqVXZTZ1lfVSJ9",
  "aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc",
  "encrypted_key": "VDzycd93m02BgbO7ChprDh92-r4jtEmi2BwGuu-veTVIYohLOEnuhvAzNcA3hlVVOX40GX6w4OKJoG7bB1bSUGjDNqsCgZBk6gKP9Ne31YwgQEMkJ57XSDpx38wMpwR_hVIJmcdS9fLsndkSNWTITI1iUL2gG-XFmfcTz99bJvwzJ0Q7BhAsz65KNxu4OE2zfAYc-HTe2hMdjQE-m1Bofj-JnYb7fU9pwIqjy4bC6t39FloK8fbv0Vzxucr75Puy8uIoGLgTwBTT9pNJHRKr2szVskmj_q2gA9AXSoSoIw5wnWojGkWy5oKoXU0w9-cMuoMgRzcaGDQhroTjC2KWGsamvg-tpL8DhmfbFSRhjl0a7wo6ktHq-uUgnJveNryxvdem_I8-PJqmm6EpPnOdVpDn-YHqeV-GufWtSZfrvFzkMlkSP0ARaTjpWyvfQ1YafDoFwplawuX8mfkusLbjEpyy5tAr7QcDFzIV9hqg1YcxZeoacHIG9mdixD3wquCDtvnYZJsOLGdMrOsBv3iI0UoPgpfLHCuVpxLYuKebFwPxLKv-eCcl_B6rxqL3V47XNZ3oODqNW6zza6-SaO9ZvW_qHRiOurzdKcvfchgbu_ZZfc8bhE6ZORTu3IFcDrrJg2UxI6kNP4vjyVw5bk9iXhgEUXKOUlhcM2Kx_Mi3a-nJ3_xzKLENWKXL4DTdLgUec9BFW0WBHLx97lst3vbTpSerbf1KAHibY6gzGU5rRpxJ1y-D_RHJBYGfDq-NAYyjrLU4pvJZ7jsWcCjiVhDZs6hbAdl8Q89TJYH9bmVD9ycRugg3BLf1z4xKihGOtzXx9Zg4d6LK5_0EPr74nCSzMhUeJ_RUZ-2fz18hxnt1Z7x9D8WZ7mZHNGyp0vgvd09iPoK0zTGbxf-lfvRnlZ2jgzvcfeNr_nwlepgoyGmnEk3cHy8arVPobC9A9YumtChq2AL6krrKiW5PYYjUUOwbUILd79Nw5o_JXr24EUkT7usMhRxiFlx3W7A-bxapuC3alm48hIUBoj_vETyginrQ-JApzEbM5Si-hlRomgTu8xeEI5dRjJtbHds4f3mwHq-TXZ0vMOo7D42DFOO-wcQKKGyAAC0Z2y9_U2khqq91gSjSL_DuXYzYEI1KeKlHeHNWtsen_UOEDaUBieVbx3W2vVKBFfIxJ8HbSu0gdOsHm4Ffa2Aur6FvvG2M67NFcleE9R-3_-fBljPKBLI7YHR7ebKMqMUT9AoQtKKNWpck6MuED6xjtcOHqEJvM_Czap_-sMHmmKIt1vsbUWLOyTDw72fl3awQJ4ouW4vZlJz0zAW1QS4Ht7I4qZ0vQ0_zQt2qvmC8jf3CnbCmQF42TfFC7Jg50aS7KcCKnWxmvjGe14JqZq1RFpkm_o4s-daTSBo1xP6MPd6d2oojPO-cfMtpssRmvBjw7XqikFXE9pouqG8JMvl1QxxpIrG7Xw474tsjAp4LfKAfa2fcuK12JlPdVw",
  "ciphertext": "bEKvmLNeGhm1mkLNQ8lSFdeGNjVGOXsEPPyp29pzjEoTiW_pP6nEEOk2F7u6Iu4Gds2mQZDijV3KSYYJ3A-oY1RA2OOq_71N0WynRiNZoBPiSaxNYTA26ha3iQobCxUb7t7XKwQXnfIBumr_Hsb-NwOVM-zj2Ux5OmHOAAqdCB1QUd8Xh2l_PlBJ1FJmbm3R8CnEFrn5Rf0e7mh-tWP1Z5pQoA1_dKaRCBDas4EtI3Vb9gHXZbBg4Bcuyu50clHTxP60g2DXiSuL2b5AIwGiEur8IaXCTjRA93QTLHUJiqBQWi5VcjbGZjAC7NRX6PdqX3b7pQEQlDj3G5mmIyJnYqrwvm-DPIzCdSyefEPo11IrWRfp-1sy18xYVy9GGuCpnw"
}
Figure 14: HPKE-10 Flattened JWE JSON Serialization 
eyJhbGciOiJIUEtFLTEwIiwia2lkIjoiYTZTM0NGZmx5Ui0tM1RfQ09PaWlXbC1Rb2dHdmpKZEJIbFlqVXZTZ1lfVSJ9.wzAce3W67vBDznwSud70PuFAzU3b0YNkXFvA6XL0x3VZ4CnjiXQudcgot9tVpdFkmVGAHQNg5SSnVsjE46nRlAjiIqfSiNFUGeDDFcoqIpqbM4nQP7U8bJBRHVwWCkTkklmgxuisYVSR1Z_DDys7xC_3v2MuVFtY3fciZCDuGq5A72R0ghlg61fOpOyIGRyEfsOoyfBmlUBds6NUKn5rpNqBGlCMCut7wes_Yyl2S06j0JZ5gmzhJKsKXkoAAcPBRquJLeaBKOXOdHNwu4lhAaUcuBnhrM6bBDiulcjQKeSjtyMn_MulAjxFfoiheSf-4mvceV2TZeRZ4elzCRSII7zV2tKrVaXJOMepemql2KqyOVSA0R7AmjGPxCOKL_QQAPFzI4HaxXWydcylnUY7k_oDfG9m0S_tQd90MprUSCJw2wA4mgjAVu4BjOuZbPPoRDwdfyvmBfsmoIG-HEROY7VMzRBlcD2mYeOgBBrldteOd4TRtr4c4hQDCaI431sFYQ2iqMsD3BOF0R9yiwpmzumvrNU6da6M4QO0arKFUtlk65MkfnLUzgE6xBFMgOkjkPLwfvnTFVJMmXoEz79LFkdCxu0w0N54mobig2W4EpxA9czXgYhU80dZhNHaInx82Gu7ULNhFcOS-odtCojY3x5yVFFLtozMPNcMfdG_ThA6S5-l9WWXsDgr9Brz_FldsWZGSb5aM66bNDacUdkXeAu72jdhTJElzcWmvH_YWx1O9L4kJj-wrwW2zGfI7Aq-Iek1Trf0lXpayXgq1d-WBsCDzTM_UIjf3S0FIqPJouahe8CoATtW3_DGis4cQnY3QzRIiZYx8AjC2B_3WXLxIzNnc8YXwZ5OzHakpZsF3ry0Azkh_NaR5DO5JCG13F3l9BhrX8dvfEbNunFbfRjHsJKzEcjhQERiKeFzGnO6DPe7WuWRm8Z0R_d_DMa2uAqUmRqg8hsYDkMiilBXYfkdUkdQJV8uJ07Rpv800aywHI7cBWEPRX7msyKkF4lnqaDCHUYBjXC0ZgWiYSPNXfbGJ3oYTGvU35Fr_-ekj2TOaW_Q9K9CKjH1hkwfwz48dvVHYdARRmXRp44jouLlXPw_9HI-N3mUjxEhPqnwHaLjUya6nNR9b7u4_gyNFirZH6zak9Pzl4GPMmAozyffqCE7yG_ksPnJk9gtJoVSwIGKHef2d_1m0Mx5dVvXIUq60C2AFMV5SOJpc8cjkfkKmJq7qRL29GqnTxRywI-SvshAk07r0g0AisjPEh3crwxh7nhyQga9oDNF447Hch9zoujYC1LkElm7ybofBI8cnXe-cedIXZC3gd8knQLZWHGdqjM_UFmP8u5eT8R1JKSL2Pp0Jj_7LSMcv_mc66tdJpoLyzzp4w18NS9u23HrzBMSPhSrRl_wqZCwWVWx1WQfU2bWUq_o5xhJcmVvHuR5Q4RlKxNOoRoRdqLnjRu77zb0AJce6937yBI6vsO0UBgLM7JJSw..mTZq6R_1yLiGAihJ5jmjFmE6hqXEWjGLZJ383eMnZsMxYNNj0paBq1YWDtA6cpIJhyJUwqULwb53TxfnDqfbWowCU3HEK-DBy8IM_pZyuTptIKGWiPA3Z2L5kAE6MMW394R6e18-Fo_0aYjD0Z4XTEi4mxe7dd43gQ4qqMidZGNnMZ1XkVTS_xW5Xx8O9a5sA3AzLPG6BPiFPqDQs_8EV0HVwQqFxnzxTiRPjeBYME10hTKn-Ao9vWgDxXenjWtGkpTfT3uwY_QTKN8_9EwjM-2Cn7sVzKZZUGby1Oo-5PQmku0n1C285aR_VNPR8CXcRALArA9wLZ8bBigX7gqJNec_kaunz4CVZNmJOabEih27kMl2VwU0NUtm2W-dL1pWYg.
Figure 15: HPKE-10 JWE Compact Serialization

A.6. HPKE-10-KE 

{
  "kty": "AKP",
  "alg": "HPKE-10-KE",
  "kid": "Xm6lJa_lUA0szEe-830gP_eXOVMebXlypAKquOzYaI4",
  "pub": "7BGc3VNf0-Qtnkh39mc9TKQQdNZ2CKPOI0kfuMxepdoEhpCMDbiFCFGQAbKlsxY4-9aepuB_3zdrdFO1NIbOnMy9WTC4tQloATJhdZpsC0gDzhku0fgjH_d7HSgwFVQlTWKJoimHYWCC-0trP7LK3hd0ugpYYcMEaJditNQG9LsaSuOAJww4s0LD74cpsfEEYpKjSedpxXprMXBC21SRd9OV3QGbK-TOCxHM_TQ9HCUzZmh8CpFMa0CsmVRgAFVCaQuEuRMKkJpXT7cKaTqlGKySDDhQYJtxu7GjmxS1kbGl7aG2kmmgxLBDCkobm5ElnSciFIyXPLlpuva6ZgqUedmJKcpea_RI3JoLTSGFJVOCOUVGQGhF75Vj-qCPNpkxQOoWIuxWNzhMHshB9MxoQgpfNpfGHpMMYNlqiZnGX4ydIax0xZmuhbGtAKqSD-G6v8OC6IaPv7vA89hJurESDgBnSTWCjXAXUirGG6QKyDANwFwteupljIuACwiFs2NQ-pq8mXOiFcnIQJaI5pAoMTNJgemcORLHpBY-1Aqgc0gmvKeP1xuI8ThupGoABVNJHFtc-pnMWqq6_HxVLAkSnEO_6mRsnSl3niILCqlLfPPI3DgCw9OLXERwP6udNERGNty6bhi4UjwbfhE1dDZMQ7zMLwnQSVw6sfWQjdC6XzZZKdamMlRlKqpnsDKUGis2Bzs8VjsxDDOdJCu3n3UxBJZwP0eR1PSkKghSJVmuGmml8JociFAxARgWKdpyDQGdHpNVjSorX8WPZZa1BMy2RtMiDoykWFiHKrMoTgpWncB4aEBLR8lTXRKckKdCRgFllsoKx4SIjuSGxSKheYl7-7GAC2V4kCVCBUetyiFUVomBeBHLmkNf8zkDfMa8-iuv0vRw61wkB3hHdaBQx_htHrUuKlIfQkyyBNWkxnCq5eJjS2emO7qvJcSZWQRWJdwrYPMm1Dok9BCVxvImElsSqTWlHEmAHmVJ1uQ2MvAK2MEktKfKnCdWnJCcVHWtPEQ-svJJn3lOL4GpIDqIznauVZYyOBNVBznHpOkIXIUtLFwg4uFMrNrFybKBjfq26OR__-AdIbGASUArIaVVJCCWQQIcZ3wCugiIx0SacAKV3HU3TVqCgGDIJIy_rce-1mshNHKeSimgZ9UyL_hzMzkGTFmK5TWROddjUWHPFSZ8FtiO5MY54Ty-KfpaSHjJDNLH3iq2MxsipZY4xBSp8OxEKciXnDgzRLAPscAgXjtutdJKSgga9qKZM0BkzOKI--Ztf5kXsDQoM9KtNts0lMKsEDCqMMZS_7KqsvcC5jmku_x3y9bKBzBoK5eE6Re5X5kANNoUBKmXTWjDNPPNJpAr8lnFWqm4EemlECwYxGBWmjCFPKa8VPNV6dnEfPdb-QHHFuYrMqVjStSvOunJNAk5QmQq07M2esrJl9U1EDEXKYiUXjmoM1oj8vEGQeazWcQm8wIC9aTDH6FYasZ1CnWGJkukE9R9QVRzMLzN8GaZ-aYm-ekbGidpa2GgYfo28bpiYJ7TorXxIzD7dccmDg_zPILaV1-ya9d2JLdz_4rZZQ42f67fHMmE93JkGCO5fInubiEUsxGRfENaU7KlDJzQJg",
  "priv": "Qaa29navsF7XGQ2OMq6X9N1eB1WTrW1v-NSiOctY7YM"
}
Figure 16: HPKE-10-KE Private JWK 
{
  "protected": "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",
  "aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc",
  "iv": "1-TNketin2DrWVAP",
  "ciphertext": "fzV5uM6AqRNg832UWliKrNMWCnjMEQQO5KBcvHBQsQmGKcNmuwzs7JqJwzYQEwqiL7iGIpJ2hpKd-432n_E72KzlugqGtOxQUjiTFOT2KdfhdOkSUbYr0AdTmwaE4U1gOSKIPPtufolUjhF26b7W5WHPX1bcQIL1MvtJCG889OkZ-5vADUYJc2NJ88BZQ7CxYnpUd9K-cBKTcO96HY9KUCfgUO_5coDOcJKe97hCUYN8tluyeKZBRKCEn8DNElLemTweOGUcW_b1arpvvi9xIx5TJK1x-XKvqMAieDqPEq2uij4VVsnGkkpe_iAdCHAlCbltI3sZDEKDbbWWH5LrzpXb7kwoNroKTU2LVIp7OM4U",
  "tag": "PYzkgIA22naRoXLWPaLvRw",
  "encrypted_key": "Yl52JxIODY0hQAxV7oQ1BL6gC-ennjuA08vZ1XXPnt94TsgUpFZdT60dq0Di0SgC"
}
Figure 17: HPKE-10-KE Flattened JWE JSON Serialization 
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.CCbUgX0KG6-I_zTbamEUOZaKxWEaNQa5JhhTmIovBtD2b-8QDy8XuOeEl3Zyb5At.h-w7sa3cWuxCst_u.-dHH2g1WEBE3lOcWjXtQfwSjSwuk1yEhVju4YQ5NLe82S0-VrgIgTcBtuUhcFv2qg100zWubrmKY4SBeskLi24VKeX-8dOZ8ZeGu4tmVfvSKM9V7PYEcvuDGn6lz-oWQxjba1r97r0eEgFYiBAc9q141AoZeIXGv7CdTGpvYaTZYfNc62IEmUtKafXS6PhzAspCY0i8_4MwItTa0VuB2cUCjlgFdPL0BRi5h7dGyo_sf-myRFQ6oCU0ejgp4lGxyZ7mVATz9TpA4Ki9RIsjfL4BiQfW2hWR8rujGhoo_ovwAHWLI8zNf5Wz6FvRrgTsaRSb8Lo7pyUCMppW93qujj3oa2oRu6htv9waXiSZpwC9Y.absbwmpYW35HUm-hSd6HaA
Figure 18: HPKE-10-KE JWE Compact Serialization

A.7. HPKE-11 

{
  "kty": "AKP",
  "alg": "HPKE-11",
  "kid": "oATA96dt4yMW31bur8UcRzxVBNV0Y0x30-NZ8x6dW3A",
  "pub": "rtOlgemxnEE1spKpxRZjEawan7uQlgA4JPQKxViqjZE_ITiUd_cA3PQJRmVLGefIIODEIZqgoHhX2qLIRDhY2oIMcQFsDsuzX2G18BcGIYNiUGU9YzoEsEat-KDELTJTirkaA8ODJnlPeJda7oBB08lC4pu6OYDLzQcCt7iYdTCFPbrHH-wIDYIMzfM0bzlINJUTmKAXk6aNCTNAUggxgkaTRSNU5qUlXzYdjeTGeKoSayMUiXK2Y9ewM3qV3pvBbmkVPqR_uahgtkk-81QbnOEho1mZVVGDkHdn6bMWiYBYQfQVvmRxhifD17TNMlLKYHROUudxoaZt_aMBBzc-dSV6KtcE1ykdknmd6hMA1qFGq2kO5dk11ChLHQt0LCGDa7kVodnMy1HCbIMj-IF3d5tEw0Uwh2Y2lUSODKO_S4aJjAGcolp1RPGftKhh73OqpwpptcYpeeaDPUxbJHYW3yaygfpjjKgpQiog6OzGcfDIyAKkefFRiQQfdBMEercKFqgnjpN03zePQlYEjtpcNyhtg4mkcDUQfKJ5FqGbenY6DwHF3LyT3kTG-NljCamDcrQPA0ldXJPPTYwLPZlyzPtQRTPBhrhC-7se90g38tOXP-N9Sbax8fWtP-ykQQbBQQk9Pled82hrRWyg5gXBnSc__OIDSbEUIMMFhqy-UrqnrkMzXxq5vwgp7RQBWTQKrwGZjICbOMiPiDlQ4GTD8BUqmRgUW0mXeaiRtMoeIzzHwpQpDLEMsCddfskNIpV4deJqcfi_8CVRY1LBrZyXvVypmsSx_nSJb8k8S9WrBafG-DAZtAO8UAMmBnvOw6eaf7RuqVypexAkvsYW3bpFcAjLGaqqVuQPChSBRUQot-WxmBdET0kkTOUCLMpeK9nEi3Zi_jqG44lR9Hm7ZmfColYHhLguMKduKut03Th6TuhssuotLVmO-si2arOWWzRgB-tcAhcfRWDIgCcOHEmQfKAYw2RRTcS84zvHoGBdCSA2ILzGAHBESQAcvoc0SWvIons9yLSvaZZrpudSHDoV5XDMbNtCIcx4OsxIc_vEYSCFDPxLlcK5MNWzaGV4_Opgn5a89LcTyLgSukxsSaFxsvmhLnDI-axYvTezhzatjfmhYwg2VcVNOyQymau1GXXAnneS-9uwGEWXEEgA4JLI8zqVESOajMJQNtqhdYAPVfOKn1lJKPpz73abLNlU-JI6NxGSsapQiMfLbpIEHKhP7Pc1hzg4nnwmZ2xgnYwWUski4lCqeWKRiRSYEqqL1-SMDMHKJRs04kWZ_HVBbPkXLAzOajAXksFbBCt9NLwkhfRNnbVzQAe5CBAfUNUYyFuxWyw8IGZkvnIHngyKgVGztQVOkHGPnhWA1kgn4QFdyKuHPNNwEnh4EpNQBLXBe1Bmq6MwPOJ7U9SrwnuDRtGCU0u2WuyIBZq-kPNE6Rpe44ZEKuWflFoMqBIFZspuJRvOKJteINN2NCk3zKKTamYpmNqI8FxdXHF3Kix-pNdn4MyWy6CXBStwXUiMKiF2rLBvCh1N2kgtbkZSh1SM3Lf7EwK5vBHKgtzFMncy0jTUHWKLpyYut0fp1cyud8VefH6I4YWjqUg-IPY-XTna20PnMQ",
  "priv": "fhCGTZ2DqLNXWjKdD8z7uSd28DZfYszfPpv4ndr44oc"
}
Figure 19: HPKE-11 Private JWK 
{
  "protected": "eyJhbGciOiJIUEtFLTExIiwia2lkIjoib0FUQTk2ZHQ0eU1XMzFidXI4VWNSenhWQk5WMFkweDMwLU5aOHg2ZFczQSJ9",
  "aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc",
  "encrypted_key": "fTSIrdEBYblWybEHWNZ5dVy6o_4iQu89alYtPbkuC-8yS7lzXiRyQhfi3GFKrj3HjCoExpa0xI8I7YbiGLNDcqnS5Kk-CHSWsvhYM1OqusTwYXicPJuJtWEm8KkPsRlaY8aaosXGxSBfiIOXF4SS4aeDi8qrVUNhc-8yMTcjxrmtT2NZPCwSiCqnhutmklNSs8liopmgSkAyUBNCbIpLWOpPm5OR3pJ3yFqm3MUCjh1e3qvrh_96iQNJJTWy93xwEaYFk-MvoouRDy_mzVyd9bBTg6CJ8QyFIzbGBDTdOLbxKh83YrwBG5rvIdNnbx3ugNc94xlQ283pyNT6gERgyiTIQI_ifV9N7LhDRMwaGTjY5Acv2FWG6rIsyedMPcZqQhvUS29YLkkR4A2R4w8Pz_QzUNNJKhePWZ1U-9HgTmP3zAQ3aTiscDNnwcA4r2l9BaNjNMsgh8bb_B6ZvucN4ZFRQcqvSjWhZTmVdOFuuC4TppvA3fvWpRCu3Pq4NkOKfRySuIQ3D47ovgSgY6AWvIxssrPs7gf0BP_SzgP6pI1oeGLOXdOMFwwKdP7VVlW-yNd3KZuC-93EXBplVs4_zlmBrFR7ENxZ0pS_ME4wQYH_muacX8VypPltvSrx7vABkHdNnkZKJmlNku-wxmc4SxRrzbCg-oN9ebSeX3me-1FVQXxEjM0cq5_ZGeb7aAkDryxxfwS2SxTETd9aazR4ee2MKTIqo_Un7V0JUwjPJwV92FL3OIvv2pDktuYyaXrxGzhHrpzJtwZeDds_4qJ_WODXkF_4Kcmd_a-w754LO6fbhp2xTAeqvMJi6RIIaunA-vzJKhl576An5E7-FbOmAb0lZlRdanWr5z4IZ3KC7x87mB28Wxi_bhiT3grX3PAfdnI9hDz6F7X7Rjjq78LWK0grili4z1VDx2f5aNijlktMZZvzKkQAou8f5OCvZ1wv0Hi5fRFMQpK6As8XjdBYApQEPcrRFmdHwp3kuSCxt43KIkYJ99zC4tfZ36VZHO2at39PCaMPRAmi8h1Qg8caIR7kO2Y7INiKDJ6JvY6jJxCtw91Dx2-Mn-KOqIyb_PSBqgexK9myfYkVor05bg1d-dIfAbV5ZTv68g6z6RAj5G2Lm7vfdmjhhiNjQYeYCreFg0cZaKqcwRpPJokKW8vangv3ldqcj5oBp6eqnSkwj6PuHbNvTcbBiffXQLkgyUBAENPwpjEzdLdreNs3MLCnv7SVtEmrCnnDfmUGoi15C_MdmCtztZO_YH-o6e_L8MlJChU5YUxWlN19lpr_CSlLbhjH7HO2Jol3MM21Ro3TtW-fk4EVItP1N1vKJpCksTJpeLZRfTlr76jmZqUZW6qik8ZQiENHlxtG7KKhyfJAMzzOjywNOJDQq6cHIaWiFI1pjOw-K1NMEDB7NEQNHteZLCZOycDmxnjWpDMB_9p2kfU7JY1gQbQwulLVDoVDEkLVB0PP7pITYEV2pVNu91GwDg",
  "ciphertext": "Dhkcafzism5hwZHcEOiNQv4CKCbL7zQhHamZ02dGXV1gcik0REe6O-LhHTsrqKvMbkKBo84Jyw8t3rw7L5m_X5g_yv46FHfV97ym0fnF5s8tND-F55-7J8eOrYkyn9C4Fpojt8L08cHSU-gkFMpDfoOa3wBTCiTpX0V5hbPwKBJo1waLl-2GMRrPdh-hJiWT3qBYw2yO9nzyOnyEV2Pn8IjjXHzQmJds9VAUC9tOIs39d2BwV0VyueySceDRwnoKUVHzwOkonyUaUpg66OnE_0GjARyogFdqI92Jd6_Hb6ASxFO12cGVqXR77cPE2WKG84Mx9D3UKy0SsWSOc0jFOANvaOwbzca-XcSri0Pq6ljA-U0j-QQYjHOvo8coPSspbg"
}
Figure 20: HPKE-11 Flattened JWE JSON Serialization 
eyJhbGciOiJIUEtFLTExIiwia2lkIjoib0FUQTk2ZHQ0eU1XMzFidXI4VWNSenhWQk5WMFkweDMwLU5aOHg2ZFczQSJ9.8xYP0x1f5Vx5Zr-5Ia0t3Hohqo70_ATNEU4-luULrhYaMIrr9iWmumRtgU_2gKkhTgd3Eg9FN9EHMqPHURMnejjR964pLhOAaWc76n82huEZkrfrBpbgQ88z75ajMoOIdyKrD2fcuSVyk5oLmvLxAfyR46iV3LPWMXpR1AEEmPrcQ2zgzc2GNjQuwA33Hed_JfDqIRo-rWASIA9uP_JZAKqyDc6X4kygyaUl-W-TIYs8-LiR7SbQbKyN05T3i-6Cx_ym3_-Cu9Zl_5KJFT2NBWkwKNE07m6yzr28ArOtxnLKpIfZT2LdFKi9x8k_qjdCQgTenjF5xw0Yd1lfj9ykAvKLAElQ8JMmXaKmF-IRtSxbD9B-zCDNKc1XY3KuVzNuhH3Aj435JXV5oZEik-8lBsuSQq5cKw_GXzfwRei0k_4uzEIGgzruFxR4lAIuqAWCx35_8VHPxgUqBei6kDr_ZUrEBiVKuSt0H7U_ooVDSg_IRIlC3uCvRQIeu20Lma_k7GMu-klS8GZK_9LIc7kfbhl7jh0mKaPMTMmr21twEjMTz2kqAXVU6OwMtR2YG4CJhNDjtfD81ZJP2MGYUqVLzvNL4cQ0zZE4eUGxG2NdDjfmt4ths85oXVpqQ9L7AeK1jeAojC8zi48eCtmDBsO06YEghNSJ86f9rZIRDvzXwuAWuRQvj05x7nDGw4b0GdCtJw7ciUmetx-HqlYQACSztgGbZ9z5L9NAsj32sA8FIp6MZDTtEpdKEQVjQzSbppwmoVQiDKItu0X9bQbmZu4gtv5eHesCSCcdAgDivS6czMGol26xNPiYouru6ph3m6Zv8gGjf7clEG5kiYewGefW8cRdLXClfEGGTJJn29BLFId1NQ_7F9wTAp6fqgnKOzWVMpkF3Z1XkQLyn8ugworwXgMfxcCTcAUMMvHFeLWKkQNXWYYotJxVhZYpMP9usq38v764YCxPeSellISGFM-_5uyuo8ghISJxxgP4I0ZJ8QIdX02WFF6R5BFwmv45wysNElHlHGWFQgHr2-hbMx7xcnukEmZFs2QRaUZj0q6ip9b0TKM0-XtHBEbavR4qwEpe1q06uw7l_imQ9MpwU8GeJihxN8AuddUmTJcj0iA22RAmUPD7XpasPC62VRq-rx9bi7FaUmZfEmx3Ml8gKMxR-_ou6pRDzHOAl_B77hYeklKgbtqkdS6soJFpXviXUZgwCCEiBAgKxtmJZoDNsX6mB9pOljPHn9RzCry6xAMiWgSNblmxsv_BxKCW3bHJmx11hsmnV4ABIl_PIL3-qingouxIp0t3HvCEK0-QxaOdmQ8ERvbFjPkiVtl17yt0RSdF07s24GsHGGEx5LoaF1_5hnIeOZVh5p0gzhbbCH-M1ZkIgCJ6sEBfUUAg7OILZOavDEkToc3pANfhWPjobYKPsF_8m2L6iAq7_TVMnXRB4afgUYxWYv4LB4FFase1KpPgSw2g7WJ2Ecnryznc5icSHg..8SpXD2Tg30qLypKNXKeGHHEawWe-BLAB1jtRgCFc5WW21V9ZhMWoCZp5Ia2wxwzNisWDvD1NeW7ZhSGfsNj5d76lCLFDqexDfzKT-ePtlLx-RTgbuQJSUUB7kLdtDn5szRUFaELsJjul0A-IODMaFJoJp5ysROBjb8Xw4eBcvRYtBtnW56gRsF6rK5eqSI3W-ih0s_725QnHMGQQV2Oxzi2erHVCFZaESg8WxEpEctTuX8-EFoMlUQHUKJP9SzGDrbPtm1Z7EeH0occBB0fdDdu30jm7WXBwXDMvHm3_yoHCiO2TqPWyUW5HGxUJBaR6SyPviHL3APMlYZa7aHBnQvCzT77ZgzR4ENH5gkZaOuQzdMM24Ab3NKM_HV7XCb89eA.
Figure 21: HPKE-11 JWE Compact Serialization

A.8. HPKE-11-KE 

{
  "kty": "AKP",
  "alg": "HPKE-11-KE",
  "kid": "16yw6KY41e407komeO6qxf7YL28xG0UNh9TkrMAgTsw",
  "pub": "lKq4-lnE13ccmSgduMxLqbPAeVCW49W_HRc0LZN74BpbXtd3vBour6MEzvNTPOxCFUNadTdY-FkEDlu5vzZCtEGv5ja9TuyY1MC2D7rGIyQLt1E-jYGlgnHDWRBGh1AKT4y5VDzKp4WGCWHBbrueXJkTy_pAsqLNONceBTHMNZszg3q4Gwd3frc4UEnKi8yexpLDUhyyf3NCQ_ijZaCePMRL2eS8XLhhzDow7Hh0AHFzddQKTFnMCQtb_xJZgdTOrRqfx4LBJlPKSgVy6IV7VzJU0HQ-pcV7LOhbX-RzzscWFiSnQGpUxTx_jUy7QWxk7BVUlnMFPHRs7jIjSYhNVMybE-ul68fEW4mRhZQGEoomLRgAgGhBUrIjXyAJghwTczOyFdvDqOokziKMH9BT1DAYDPsh1bVLVhUypYwVZJkOzvhMf3gY48Ehg5Z8SigNvetrKIp0S4GKBRJmQgcnqsKEEyNlqESOmTduYzclyvlaK_WbxRlS7cELH2KLNoO3DjeY1aWy3VgHzDnDAtAMDFlIh6hW57Z_FAJgDsOyw1w3xaonSkBzXeq6EJEK9Lh2yBKlWHKpGxNlLBaWNMUNZyQbYrBPzUQSr3FAoMzM0cgd6ixYOBax6KQCdEee0vmO36vDr-BjhHIWDsM7FnXHMIVoBimzpxtAoSm7BgGRR7C8L0Sx3QUxNnAy87WZm1wzY5BbkMUImIRc-ImI6pAimXS11Ry3QZKfFIoPbgoWP3CSDlWsUvW1zsPHtKFQB6ctZqA9dsxUGIlvz_NU1lRmxCikX_i5D7ODyGtO20Qc-JRfN0Gz--AZBvUBnuERU0l6T4VfrGnAjloaHXE3-dmH2WGZfFsN5jmuDjF6TftXkGAd4XSCTeBRK8bJXMMEfgwySWkJ1paBqKgcz_kdxAdq_YgqJnBVXpuySakJpFFZRVdwy4pPFGTEG9efyNA4cytF-dcES8CdosoQuhZECCgt1DmKwDeIzMQblYdAzLGmUPFm-kh9PIiSj2RbZMRqUWujP1Ih9tqZszsYk0O14PCqg6Q5srZV6KuJcIal13mGKmPIoNuY2hagL8Cm8SgPkIwJxspIuPdFAFMVW0skQgKvE5kr54uJqkks6fWNCcwrOsleZQgghAFBPUeCAaPJs6ahpARdRAAXXGe0wHBZtCCMCisLmgeY96lb2IejO-GxXpIVkKQW5rqnuRYV0bo-TQm3eqZ8Zle9JImoe4gAEDpKubuBsBYiJdDG0vKV_OCbqVo7RjfOOOII_JVgcPSHIMY_7wK3vMVm_9sVLgwTlgY3aeOf2xc2WuxB8CorF_YEXubAUvpmBTGvy_PMjBCOP-ZKmXjH0-QeWkozUHwI9PoIx5cN6CAup8N-UnBETUGo86Y0jvVppHQ_I_HDSsaxPwZG6xpIlot_-9ZBFSARk_CXTBaUnFoD9pyhNhorZwwzq1B60uGsATVAawNUnYzLA3BHm8pVqQujN8OccpwNoVA_J3pNHbmsM3ZSr1FOOoiiemIrzHSii1RtFjs5qemnMNyx1W3RehOz9jm3l2iiwsHMvqzWvDkHCLDW-62p7XiswDjQzsndtR18lIDU-qywIMTYeOB6mS8yrAbnL_Gib3jqSQ",
  "priv": "2VXc3UQXfKmSzSm0X88gL36qs_QJMPYyhQ3jHiIF1UM"
}
Figure 22: HPKE-11-KE Private JWK 
{
  "protected": "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",
  "aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc",
  "iv": "cg0f-dpji5qHsko5",
  "ciphertext": "0kgNEY2Uu1dYAhc1--H00VfnQFJ_FPoYxPmqRyQdv1U624O-oFv2WXraV2ML4nMmKPpVYV6CSrlNWMzPgkSL-JFqi7xdaXhwXcdUoFWcCdhSNdywiCidhAMDkTkZ7hBWscslaVtzvpoFyDdqaOHQL7Ybh-UaNgwv7Mvr9ReHyVP34pdbOibvnLiCLIpfqxMYGYqlYk5xV6jzMr08BZM5sQe_G89SIzbp_kOORWIiHEtX7x92fK1zi-pU8fAZX0jYCpg2jnH-bg_NFsYeK2GIpf0pvxDs_1Eq4D1ZDsi61r6qS3wFA5yjZy7GBddRfh6OkwFfd5Aj1xH9N0U6xwj5Zj1QGGY2N7sD7jF94HT1l8lt",
  "tag": "Fwv6YMW9AqPTR7Rb_HF8aw",
  "encrypted_key": "LNSoax9Ga2QpxI9jxzEGQNXnKignO9Su9hhWxKs-o5y7DplfHR-xvzmM9EJH8aV8"
}
Figure 23: HPKE-11-KE Flattened JWE JSON Serialization 
eyJhbGciOiJIUEtFLTExLUtFIiwia2lkIjoiMTZ5dzZLWTQxZTQwN2tvbWVPNnF4ZjdZTDI4eEcwVU5oOVRrck1BZ1RzdyIsImVuYyI6IkEyNTZHQ00iLCJlayI6IjRUTlIwcjdNQUVpMEZQZUlBTW9WNWx3MWNYWEFYSlk0a1VQcGN0U3BIazR5eUxmSGxuUl9VaGNDZnpwSlg4aDZUbG83XzM1MEZSdy1pd1lNX3RTTXBVWUJ2VjBvdnFWa0tnV3NGY3A2R2xuRi1ld3ZsNUs1ZUxaMklYN3F6bkpfaXk4TEFvRGV1YmdudjQ0ZmN6aWV6Z1dfOF9Ud2FHUzh0TkRtaHdTcllOZ0VUcGwyYk9paG9jWUZIOUhnbGs1NjdsUVlLd1k4R3hSN3J4TnAxWDB2T0c4OHlCV19QVGt2U2loS2ZZWDJsV01mY2M3NVNobEtZdVlzSkxYVG4yNTdtNkRlUjFEdGFRRVAxMkJJa05KR1pNZlNCeF9hR044NU1RRkxrZEY4VkZ0SGhVRC1OVVJ4WnJSMElmTjhQbzF5UjJzVGx4TGwtOTdlZXBJVVNDNEF0Q0JRU1YzUDNCbHRHWkRGTjZyNm5fT2hmNVBDTmk3VkZJeG54emZtaEtTRDFGY0s1UVNucHJGQnlfX1IxWVlpVVkzZWtSN2QwUzR2emhvMEZyaVZZY0d6dmx6QTNjUENrNE02elRCWGw5Y0stQldyRnlkMVJCNnNuSWhXRjNmbWRwMm5EZ3dKb21JdTJqSUhNbm5aclIzVEtUUUllWnkyaV9icVFjZjdGdENQTXVXQ3lPdWt2Vzd5YURBOTJVRzdNTnR1NUtJMXVyZVNZR3FCdWMtYTZzcmdnS3pzRDFYeGNUckR4Q2RsRi14ZHM3RVVpUEZLYlY0RFNCdjhzNUpZTnFhMEhCSHd5eE5KcFAzQm1PeDZPUFA4dzEwcVJ6SVBBbkVkU0ZLWi04cWZweHU4aTFVRWM5OW9ENGsxY0UtUERLcXlhOUNuOUtqenJodlU1TUowOVppX3o0eXNPQzhhQ21FQ1RwalN3ZmMyWkZZcVJXUE9VSkpNTjRxR0xodGJKNmVxUDJxX1l6Qi1WN0xZOVY1ZXNpZFpYV0RudUFVdkNKSHNDNzkwdm5fMENGX0EyTnBRbHo1aVZqb0d3XzYzUEJPamFLUTYtazhyY1VNd0NTakJXNlpCNHhkdElGQld5Y1NZb0pTSTczalFyZmtxZXlCOUdRV0hTQ294R0MtcjdGdlJiZnpPRmdyMVNrdjFvLXM0bkswX3MyMTN0a3NYeXlySTR0dTl5OW1MUjFHRktjRnZvalpIbjlnejRWZDlJS2Ywb3VLWnl6ZjBqVkpmNFpJTGwzaU1FME5uTlExTkxXMXRFUkxIQmpfa0dJT3FCckRkNGtsdGZNN2Y3QzFaSGdoTzFkSGRzQkYyZ1ktWkU3Y2FSd0lNYUJNb29RQW90QjJHZkxXNFJhaVlWNVZwMGpxZ0JDRU12WUdydnluQVRSOTQzVm5SLXVaWE1YcHlTT0MtbXZOZnVmbWpSVDQwR1c5VHBRRlhrdU00RDRzdWtCalRMMzdSVkl5V0psN0ZMbUQxYUJ6TXdyd19ZY0xqQkp6YTNwXzhTcFlnNWhJVVR2MTNIbkhWeDcxZFIxQlB3MXlpb1RXb1M4NmFTeEtKbWlORmZabzJlUUxaSzJST2pMbUh4N2gzcXNnZGJaWkMwOWtkb2c5a3Z6Q0NtM05xcHN5TU9vQnFURVV0UC1XZHoxTkVhSTBCM0xPTVczNEV4REItbnZDMWp3clNYVjV6Rk00Sk40dFpsR0JlXzFfOUpBM0JmRS1DWWRNOGllTHhzMzFjdW9xUHNodVU3NkpKbEFVZzhvTnAydWhMb3pPTVRFY3ZucURBeG4ybGFqUHU3dTR6WHJJbmoyUnBKUkFoQjJWbm1sY21FN3NRWUhIaVV6clpCczNrQWNnaWJnRWtpRFExcG5xWUluQlZXRmdCQlFTUW9XUEh0X0xGazVYbVpnZktRN2FtRXU4eGRSaWRzdWNGSnN2S3NOZXgyU3NKbk1kTGdVQ0VibU56M0tOakZzVnNHVlBmWWJ6QnlhZmxBUSJ9.dSfMqiYf0VBU0_NFc_xhyV8P9QfT9NwL2Prsf_N8bBQEWtVJz8ekaqblI5Y28Dd9.JdlIcfXr_xiVPWp1.Kg09nPOFMWSm-bV6bbZh6k6qpvZOqVn68IzWf418Ifn8eMLCdq_cbUT79yi9JjZq8pPIXs7stQqYhIWjI4W_cXvVv2sGxEMXoy41A_6mYMi2xP5bdxqfwsjo_YjtiSgBjpIutKmjrFlYc4hnUVAW8VTDKi-calET2lJ1b7CvRJsiGrGzM1snQxLjCFwdJdeWrUESw1DmsqYdOsNdPoP9uW9AOe9GCYO5MPpmbywwxPjUZyQi6iTcu2SAfySC-2cp-wkdcUapApormqOP3cWSmVCabIwF-fq_tDxyM0t5ybKhxRWdk8n_-MN1ajVgplT_1RoOhaPNYckI8hzNNbR_eX0owVJ98CelfAnds-PUN36T.SfL3UTfQjrwP6TL-Q2NJbw
Figure 24: HPKE-11-KE JWE Compact Serialization

A.9. HPKE-12 

{
  "kty": "AKP",
  "alg": "HPKE-12",
  "kid": "9hyupt1l9mp8RxMj0gWDx4uZFh-Ltznar1iPyKSOjAI",
  "pub": "T5e9TgLP4Bh4gVFU_cyS4_iimjOLAvFmPGemydw7nRVhhEu3oncfGINoOfi-fTJIQCvGKOzCPbVarggmVCJkZuFkchMhCeaFA6G-RWAZriFRc5A0XuuE3pJLXHnNj5WfTrOMiboZpVeDfjx1NvTItrI2NKhEhCiJrFZOz1xVy-aOtsMx7pJYR_Gp1ReG2byJ9LCgqeyPyTeGXCdgGBQg2gLFguqGlqmRNGCEkGE6uhUpbehBn9k3CmJtMmMZ_QklIgMebBy1fjWzjnSRXhu0v9A_G3GJQbGDGxuj_Uoj_Ma5BEWOu9ZIKpewyEyMVTqkDwzHGtoAWRKAfVmcImdrRWsvJja0H1hN_uiL-PUY_ZyyVOobGfVXdUgkJbFx7_K68xoCIhKmHgAlzSC878o24UUrIXopgrmL7fJppwhH0-URz_wqtOGlz2tDMUm85CkRzcdTMHqMpmhIYbCSm2dFwNZTZCpfboE0cXRRLHI7C6YFMXFZTGmo-ZpOJ-FT0RMnw2hWnMS7ObuDxvrCSPRdEACseAaCvDN4wRAt1YGN26gVvAo7wIyqT5jDLfiZ05jCmhMQwjNzsYgQGgOwAGHNlIig0lAAaQuFlpUjpEBzsXEc1skNrXuOPyhn7sysibu75LNvc_hsXRgOF3aIKLl7OQBIe9i7Z0pjT-EHCUGLR4CulIscQCc5UKIDb2dC1OAfFfHETWAfhsUKXBmsQKECZ8Rr7GasO2oON3pBJONbXHVVS_Ybngle3di_THMO9YOmNtt1ByI75egWLvOjD4Q2XTdjBnh9o9qa9WQTUqB1YeNzv7yrDtBAFIQecORT89G-pvhnkOcfzWeMrakW80hGfxNCE_UsgcG4f_csFZlophaQ8UGu1sJ5DgeFFNOQ2-AMgHk52LK1pIdQs-ONrndBGzrEEvEEYokRD3UQbwec_eYn_djLGco4VAYdedodBnUbezqYZIugd5xVRsfEB7QRgDcXeByH7tixrxUvckIHIJyngJWKFRUlLCyX8owV-3B6K7VkvkoTFlWbOzqtViGicWw5ApwfNBgVu_hlOAY8bURbWsGLc4wtQ2ZI4_GNfKgTMULH01CMPrst5mNfYvgJsNVqlkNIoCIDzvhZjSjGCHtJOQYQzDx2TpV7eYpiocM943ANKfuz3ICDApETaWYeWFdgn6wS98dDfQFzSwgq6vEGT9mQLhNOGZWdGlJvrVMeExmXsrdim9hsigIrSotrziU8wyKsx8JMl2DMXAiA1UeGJoMWPDAwM9ocVhHF8-p1AjeuGoI3ieqVPuKBufiEO3cwZtwSwRtCR_ZnGDfMioVtVMNPcfUGA_FxyyymKDmQBUoYbwqhTId7zDlK0CgyJuNn2oEa4EYxmmRgkbxo7tl-3QVfXvikqtdjdeRWuye_h5tMgEh9o2O0QmcskTK-R3KTt2HKwRuZe2eBjLudxVx8Dppu2vIodYJ7YIDAoHZQ9haev0du5cCbfpReqjtEbqRYBIhoeRa4lppjcFp4C7N0nFnIAVBGPRnINkCQkWImdiqWMtkPw-w7BmzIXVFAt2FpGWlWkLC--mmk9ctxW-bPU5ctWxgy53A3qUAq7iei8kRCujQnCYpNawRgHPhEOExmybupAQwYS8mXLaRT41cgT9zPxHMtJ9MjugQaayObZhDNWGWRM1oT_qKOb9ChrHNYcsTJShMnPRKEuqrIaHhPflyRzGcMTELK30OqDjzCBue_5GAcNJOd_NkY5Mlb5GkNZFuNvSdNZuWASHCuFrEdl5EEg4FPkuG1OwCfyDEl36Iqe0s72NGrpzClC_inu3iN7uBiewrA5MuaQgArAmeTKzTJ6xlh0acUIFljdSI6fjVIPnQxd0ZgpSi4a-eRNNh7XVx6_FCBUpMx_upRo_dbkum5sykUyFp9lBsU-lG2asWmAECCPOF_vYNxjfZdx8qMORUAlFejtIA7Y1l59Twj_sUpgRt1MqifqHqC1hl6r-TO4nkEpGNIsMlGoZssYXqF8VKqy2xYtOO7z-ekQ4lXuXbGU0p0ispKA6g27jiD_i3cOqthr3qfhE9US8S9vX3Se3fFV1vtqXrmzKf3iHcEGzWdhwMZNnPxSXIbXrgVV7IIfgrDUd-LRuiCU17Y-pOdgA8CRx8uZt9MAuQH-Llt1DZ-Uj9VqTqHXi75vaOmfh9DG19qrZyV2p-IqT_B7fpqd6apRjdO0yN5aybNY-Zq",
  "priv": "HqetV1Ap1ngNbKSzJfWFZKTK_8QjORJ4iWF6NW0GdV0"
}
Figure 25: HPKE-12 Private JWK 
{
  "protected": "eyJhbGciOiJIUEtFLTEyIiwia2lkIjoiOWh5dXB0MWw5bXA4UnhNajBnV0R4NHVaRmgtTHR6bmFyMWlQeUtTT2pBSSJ9",
  "aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc",
  "encrypted_key": "mOKslMw24OI5dL4k7tqGQtuAJFYDzv80cC3Jjj1qDIFOwjEHQpXE6cj3sCsX35X-W9nq8F2sVX5QNAXkeCG3oW-dpOyy9u4lOxLcxDx2L0u4a3kdSNTOFFIRyrQnGjAcRw45RmUZWB2Q0hKRBT-5pkzOnxTbSMSgVJbsztaYYWw34YzJ5rH-UYLsLVSG-gIkV_ZLDn7jiM6uqh9_IctnIDyJXi21-S5VVUNKzBPTe45ZWuaO-bWZVzmfSVbX0V0KeK92I7k3r6Uk5nRBTd5_9tAf4-xZgPR70p0XipvVTtsnfRbBB0AqyCuMqNxOoaUCijogeqA6rrVLfFwrGtiaNlLkloQWgVOWL9tALDoMcSBE874wQ8_WKQSavGAkibe1LPFveg8ak0xTZkTx2LQrDjwtTD8_FIq2e75lmIjtnxYcr0N_bccBVeEhDJ9c_XSBzUyavA659SFxt2pK9HLGSsRr5W60ySkT3ROMipIf2SJ1tkbJcHOgFkofKti9II80G7C91V8i-gkk0En-UiuE5YAnO87oomCcH20rm86TaVVroMqNevsUmGbFwXzxPXMWHSrTemhN5QGj7iWiIngFjmd6W_o5QIuEz_6pCcQoYyxp-EVRP7ZJj--FQJKR5LJQHCrrlCqRXj0fSuq-eraWzbP0jfFmiDWO8J0uIflYq3m1TXoR1P5mx9dPWYF8e9a1p8CldRMwJBbLJe8KW1ylei35Hr7jY1raWMizfR_rCQ2KJtXKoLSmUZ83kx5deEILbg1-VConWamEmCPFsdr9mbiqX5ize8W-xs4G9UT0ZZcIfgLKuQctmIUI50A6EuVQN0zbsjbiIJungaNc559wgkr1McxdwDdc-sVg4X97Csx0_7tDmoqWsKwQbquKfKfArkJmCOcD_LlXIPP9BnKmWIB2GYpUpFiXLqgxvKxAowofMT_KUI1w250GnK6nL8eNa-HjR5y9lpQizUpHkfVRZhDq05ZnqTxt2hTV4lArzsThYjIiv5o3YuyOOQGlRsFPMvU-Ht_fEhhkEbQs0IrJhKRbzFr--S--keDsKHG6MlvehrJf0ZOqmNG8m2KAaLH-UZnuJcephbc5hZit5KHEfRlBno7VOWQUFKdNO5xhgn0F3pZN34xnGCA4zbfuFNWhiE6O3C-y5Ya-O9oiu2IWc49GeS8CRO7s13V-P2jHJm97qfVzBa1SsG6Ue3UjyaDqIf5wXAVbtxW-oCOdHBFJzOkkv6YRUoZDuLXbt_2ghL9M1sONfn4lhkGh77OloU2S_3DESDRQTC6Cj8i3a-5MfsiPBBfUzLtWGAwo3p5BzPZckSFnRj-rA2keculv_gZdbNcFAEd-196zTAKK8zCEssHSDIVR1PQXSmsRmy_GztkcEermDBip-AgTzgP9JbP2GOQB2M7nXVHprAmAr4LJH_x_jdpeKW9TZLIhM7nhNQ6yvWhj0hCEKm1SGb8gTWoJVVM6bSilIzuviKBuLHzPV_0WZPmKNeO3a6Tib7xFhfcN1GgHWxhxQhWlRj2gHUmgioiwjiVncLgRAqStkkGnBIp8GhdxUsoQfv6ydnmyQePGl785KSuj5FkCSQBupSPvURgDrwB1Uo94iBLceF9jfYCa--6m5syebQ7wAPxhmPqXcTaH9q6gh60cwG0rmI_rM5LO-V1ErmzoeA85bPLA62tgUJoQP0P6BWrnsjvNjutK3KdxrfQfSPP_5QT1oCkEoqrA67EN3Zn0WBLnZoWVYyum1XMPx55PMUfd-2ErnKG-4UViW4pNr-TfvQKm4cFG4E6V8KJC0Zg3xRvb3TJTLp6B8tsZL09bkkT46KuliGPuH0EXqG0OyAMqdBFbkKuNBfO8IrIDnX9Guh2U_5Qv-_UadYifMywB1ndqM_V5Tyi6YPg73abAZySg_vG6lBJfY7ZmwmpL3PR5QEUI-bjpk2wna5E4yaNa98ZgdAeDls9ZMPT3KWDH0r9J3eua3yuiqdfzS5r5fDnlJZZU-9213CwZEiZ99B9a5h_IKr5UjLVIM23w6KdPKnA8JAKqkob7HctJR7VQhJQ1SXaV8I-AVMqjcl7Yu-GnZY6TfehVPMYEdC5iKJKvJZVvojyFnZanuONjtfHrJr58P3RG2dYQwruwhheOYewNcci99LObrw_AIHJF3VhqpU93kdX8RDauxZJtYl2kDbVaedgN8P05253i1SCBoUVdBF8w9VUbJalz",
  "ciphertext": "6HfdMud0wbJkF5pQOcdQYbyl4IeJhdfWzlm7oZTlVCz32V1Oc5ls5XQEOpaHEYUQ_DeKi6rIZbTrPfpkt2OEFLadbL9sJrDhWxxunlAOfrSF-_cbp0gb7qA2OYCC_gfhTD3yVrKIAtNf2E0B4W9RUGg3emqynHOa5A54GT4WHSW7P7KCiAbibiuBFwcEH9GBxy_c3UOEcfPeytw8oEUhIGTApMgAT28m6qUaZv_-saa-441Cqz8TIg4tLnZi6ir_PGALRXB_lv4K7iXIhChVZKzNxb60dN8Ka0BYsfh1pp8Bg9RduA1vaaK89KmnmZSMUB08xhykJnLurS1eaiLo75yIg7ebaIkmHObjgKMQYR6XWVws5Y8ofN_R49GjCIEXMg"
}
Figure 26: HPKE-12 Flattened JWE JSON Serialization 
eyJhbGciOiJIUEtFLTEyIiwia2lkIjoiOWh5dXB0MWw5bXA4UnhNajBnV0R4NHVaRmgtTHR6bmFyMWlQeUtTT2pBSSJ9.BBkqIHG9zOgCdcTtbrFZFzjenqoHnnnpNc3BO9Q26GkwQ7NlKnIzNuHBltZTSclj8qS050mnCThc5IQ0t_ba-OVprlkUvcUxUVpfblG3znGmZ8gqHOMOajxu4XSs1An4J0n-oa-nApPZMCLf9cUgWHBRK8Bb1_mHBFz2sKrlzeuBNe791X8CgbmLHpwKgOjM43P5dfp_84X3lPp7usb43itWyACU5m-iiLNnL_6o4uunKheCv-hw0BH5AF08y8xqku_3j29kqF3Hi2g622bKm_T17JuNq9BRY_OeJLxuExoWNzULuFkk_OVfl46DMU7jTggkcbvWO0Eo67u5UTRZQaJsee2LL_Q2S45jwOGTx7JSyOANVUH_ypTNtIl8AW5N0iV9p_-UVsS_szMea5tiaJVZMSOJNngbVJJLeyDZ0FdJxDsmfa--6nxscYJRSSN821SIT1OMLonFIbaFXCSzkezwYpIVBmYm6wxmkRAhnQbKmjMSQIKMvVGXdmi4s4Sw_8ciniTEVj2DYu9q_9Evaajc_tBPeZYqKiHawpGYKizs1qVm3Oy66CqVyEKfyu_C3vMpgvVhGDZU0iLpJQCl5rixQ8Ab5TmDoLJFjXVwh6kfG8k41W_81b4GXfeZxOQ-nWuUWKM-1yZMxYK4lr2UmnJYduaOJNcXcnXE-EO51hyTBSe5R-_lcABIga0bt-lpJoXMrBiPv5KRml5oIJnmwlCz5kYIhA05x-V7Z2b-1gsDry9ONrjMFb5L7-sqHp2qh6xEzpekILmNOYtBqa6hi2iBuadGKJRgaqbDOBeCmh6ZqJJrS2leKov2FHJc2TpQ3uVNipXTadDEh9ImdSI6YjFjVCZhkyu90OYzXTKS-oBQQcnFHa9rOpgMJYmJQ0FWjvwoQwGJ0rCpnWvfeKUco6b9xXBWeR1bhMwsQwyd39Z9Isyo12w8iw4w5oEfxrr6xJcDvwCkP6dyE8-0YHT7dIcDwyQDYdlhmz5gU8vWJiREPwvjBYEVAM--LuNbH5drUOczp1BaX1WtWt0RmmYNuL6SztEONqyxyvTaArS730hmF4kvnuDYY-iGW_wFcvSAMZwTJUBhYG2oEFmldhKMKlsOiOgeZNl4yn6xpbsBuCmBiTPTTqUZoGCYOjgF4HjLFzW9u2apfrSUNk0P4C6cM5IsbtfkJ8I3cfVWaqpLxTfYog2nW_iM7ptTWe9Uja3qE6FWh8JYBDF9iDiWKi_kx1NVox8SwjoCgcd1kmpd8z-lM_1GY3G-mU-_j6vpJiL_-t_uUZcGtEL_yjorVvlhtWkZJrzoMebbZ6B3LNMTXdFrf_3O8nAs2qoztNrYMHoJF8RjXRZ2ofV-CBvmwvDjaoPiV6aILWwlHEKvlUXPlKEKihP9ELlGPfOBkMMyUC0isLTHtXuEMx8Y36nQw9-vCaaQTj9TfQXk7nz1O-hIO-BKPc-wi1s3T6b5mHQGDQu-0PsTYo5MAwEYoQmyMEKG5G2TKn8qsbU_qb9fegHPyqk2oLtUJvNBjQM-dt5u2hRWHX-MsaGvud8EpbsE4KLrxs3XMx3gWsEw7zSACxNGeXjiLn09XCGslbnGma1HYbM3YbsO_a5FSj8EzgAAYYuznqqlbgLN26VMmar1hfB4HUYvSjOW6sYsSIY7FL8Wk3rKoKKrg1xC7RxqY8H8mKfFRPVz_d7FdmBYvA-fKua0f4L9XoFnPf91h-L2nBL2-0vhx63rSTRZUlmqHmumNRYOHQN4ofG-QNX7u62EriJ74ZrrC2i8JKu7gdYK0GRjxhjilNMp3tcDeD_1pCVEvepJD0rSOs1QUfz3RvDxEzDmTjYgZhwYG_QmOdLUTlj58ZiPVTz7uJ4zFpqKpEcdRy8Lld2oqsNakHpyDBUGCa_szdihyw5joca3g5mblqEporj-FxEC3VSYGO5UHtdxEd22CzgAJOmDe-nstuwyoyG3xSGav3vU8c0CGzSKxRtCfcFuMRSgbDQpOHcLv6XTcW7cIpUgrb8KoRgpvNB76wSQGALKPQk0CM9vLMdTRRtjvsyxDT55QByPrV5Oq3Tcbw-BoxowPCLrnadERLacGRvoJfgEC3CJHrFT7e3p9FzBHH3lB5qwsn3h3twLZOLZTfGWLWvh_EgzAyS7WTcIIArPqjxLh__CKHYFlIOBT-JPle3eyYPeOlZTFFDH91wbqH3En64dNDHPH586wYzY5Q86-H7y..83T3De69LdZ94fHzNW7dsIZRSHYpx2Nx1w70DR_7nfhidGRetVk5Fdt672fSnTvML6PzfIX7ClQwUUo7wa7u1RSrpYu3gAbdvGvhz3abVXD289UYVDbPhf0v5zg60S-k8cuyIYxPrP-LvPZX6Pt5Sc8ju9SGh5G9RVvUF40BIoPUxKuSU-AISsAVsGso33kqob_WgeCl4rt3r58iNAXeWCpH0iMYkkjXm7attTxKJzDb6pVlcGQnHqh4uJlHp6Cj35IT_SDgN1jaAkEmrJDjoktxx98e77joX6ti1OCWlBThdrJjXyRzeiD_Q7Hv-iP3aJATSgKKDv3jmuWpsByNylMBH3GiHGMXUSAbNYDEn8v4JBnN6vqhdC1L1lPVS8e2LQ.
Figure 27: HPKE-12 JWE Compact Serialization

A.10. HPKE-12-KE 

{
  "kty": "AKP",
  "alg": "HPKE-12-KE",
  "kid": "BsXA57jAXzbAJAOhd53PswMI15Hkgk4DZ5Q_FMN_E-M",
  "pub": "8gl3omYa2xs2taMSZ7wKMRm1AZVTxfgNoLQnCoEX83tgYOtAG8hxDHxSXrcjDvYbcciEXIaEFDOebVZ22raDEttnFBYYkGHO49Vx1eS2u-HPn_uC0kaVzkiUBKOF13wLr_qtVaIJWGCYO4Kr88pg6_e2JGVCuplK_5s-HAKYQscucJwJmKg9ImAYNflPhhtXs2NH3QqkAVIPHxBYr5GjVhVFjeazH6wIKhu17btHecdwuXSi8xYM3pKuI2SsSaJt74ie_Ic8zHROgSkgUhFdV6B-XwKuMuCUoFMjxVdsKFcdfdvBa1tzbMS4XUec8FSbQ5am0JRvYlR4MbiXv0dO6lumQgZBw0yBYBmni7FrNPMoBexobbF9i1MdIVOI6LpK_2QjD7l4HseO-RIhuKPG41mWPcmwEBQxR3FjY1uZLMiH_cVGVGxcD3Iye3AUlaNDTIU6HjQU-gFVgPVOpPSp7jw26TY-o-BldOVu6cRSgnYLROdZrWE0x-MPwJJ4UDpWu_CvjNs2TVxbSMoXeGmyWDqq18YCTPcRQjUGGgpahhgjh5d7iTNIoeh4TDAJB3cP38pW6VJerfDKT8d14asQ8mlbgal-kLMVpLqF5jS_p4pd8Yaas4iNWaGKIImtGfPFpFyuqPJLMDGNHRyGZHJTZ3RdjksC7ONQ6kp-A_JozJTAwdUzVWiLbnTFdhqSlWKcI_k2HFN_2qWlNHYPM0x5LSVuxrwxBQJ7x7EwfWLKvdAazFM6flc6oWS_wIR_f5oh1RzKSMyZtikHNTvHJUFb8JVVa7hg8WeCaaCbJpvOd4UwAuXOjrN_fsjGbqbC4GBXmzyy5eUecHRNIMO7JAeDXHExoiSE9RRKzeFUT9YIbAAJMoUeBfk7ixAgKMWsLsm-63hUlcNsL4qWJalLETYvQoGjj-AnFUIybPgo8WW7C4wDkDhq1pwLFuFCySJniIRXrUR8HYtcJKRXVgJfxsgzuIcNemWQtcanaUSpq0tYlLS4TcMRcSAPtyZlTvqCqgI5E8CSIcYIKBxA1YSMeCc2htEGt2AQ1hYGE6RkSqxNQ0Sg5Dc2sVZW2MKvCTc82OcJphiBTEFHUswKCOpWTCaS16CYS9UHn-c5vRJGmlLNyWVWdme0qLgE6NoxbayMwwtgOICHFkESrDTE0TlpnhEbN9UZhFhQMpIRtmqWddigBtpJFQKKmcXHospN12apeJVLPFdKYBA7YXOZibStuhVljIwF2aYlAHpTLGuqkBsWuDMMj8FDgSVi6BQr-9fMtkOXvncbR1Vi68NEmoRWt-YKnjs1JEw8QVwC6WCDygqZKlG_tOSFAgljsLkf-WZZ-JN8nRGDXPmzLcTLmxS8hZaXkqcSHVJij6bCVoK9olcSccac83YZd7E1SexjwWzLR1pTzjVZZ_rPK8I4asZxWEGIHAXMtjJlEGWA8UV7tBdK0tc84DDA52kRhUUBmcjAU3uU1csQMTlr3zwccyMfmqsCtNoGESG-zQRRi1zAuDpnofGnpqjG_piD8WC85ykco_JqzJMK1KFR90dYThmf1HFwEDtfvDNPSyLOiSd4dwRw0hUB0XHHLGNwKkcocyI7pBIBl0xJO8RjuQuxacYyh3ND1BJP4mQQwnqt9PYomxOhs_OK_HIVwZssf2eKEHvJk5Am10O_N4KbsoebXAZg34tK6NSaKWvFAbkSkWmuYWm1fnp1bBM1Qxs94rETZnXMlVRho9IIQbIPvpFTQ1QXvbzPFDs4JCZKY0F32IC7f1O8oqvBmAgjtNqaLRFs6dHKzOJDsDTLjQMMmOYTUYI4HHBV_vRI3GZY3EcWxAWn8wcLY3hBNPshkGrJBIfIR-ZgvLwq1kFj3YEKUdIPGoXGm_RoFYO0jWtFe9KM_8Y3IZxA0WU0WRhhv1azGGMnnkqZLxNJFcWZfsMVQcKdiflYXld2Alp971bK5zMTyKSJGEanfvLPKmkDWXlyiWnF07TAfks5fBXNnxCb00uT4wKWZ8vBtce0DkE_b8dYLMlbqSCae4Yb3HkE0kCwnqPMKHNzK2C0QjuaBAWAyxotOTs3bdgV5f8oTOwaRHkaCZqKw2Z8mtME_n9odztcVrqHyDHY26wUSZDVWbrpymabfcph3uMuDUWSRPnaNi2FtfPrTdhRfwZ4vSFA40wNAzC_ozZn8x70Negu4AGZSOXcx_1lBDH8tYyzuvwskNfttxTlG8dZAwzE",
  "priv": "0P1ur4tTdzfRWIfl8Y85Wlv5FC3byzBUzEuqMuXjdh8"
}
Figure 28: HPKE-12-KE Private JWK 
{
  "protected": "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",
  "aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc",
  "iv": "3bhqLXggqXRBDCVq",
  "ciphertext": "N7IautxehldwvlAgWG3RQVZx42vpt34VbBgboBRwXl-v9H4dPha-NbItvkWeaa5H-FbRyk27Fk8IbZpbYlu58eTS6TmFKA748L4rzdzcdWTR4FO_zWCOJAVDq_sWOh0ns-fTWMci0vcA9vJXyDSWd1XTyD3iVWW1RuMIJFZ9AAnVtSGEoZPWg5OBroFNKjuWXAMzJ2kwntaKpkE7WamTg-An3BKbJ200rLXvuhsMF6mh1guyvWFnuSzGaXt3D11PA66mRycuASPiI0m7kBJvIyXaHvkvQyI8kSc5Hli_oCQP8t3hlFUz0s-g8R54qkkMM8CG7y9p129DCvB2adx85nCmQNLa7YHYQ_QAbffBWu4R",
  "tag": "mHnowjgWKTTTKyc7HgcK4g",
  "encrypted_key": "D32Uhx5SCPOA3TvtLy30PNsium52O4DcgAVFfV6LLkcRxSGJY4p4XlsQgrUpRSj8"
}
Figure 29: HPKE-12-KE Flattened JWE JSON Serialization 
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.49MMArVj91AvUzgI9mBNuJWkExGCRCagTGI0eURyhM0UHWb-30YYdtZPWDr-nc0C.Ptyo1FSG1A4a6Uu5.-MvYteyKVKdbHlG3tKjeiTOl3e3t5wxT8kq5_tdYcch3RsSl5YJhnTVLeyFGPsj7a2q3LE0bhVZFUkTJznAUmmUecLaeoHRj4FrQ2TPE2ccwzBF01fTNIcfxtoP3mOvgvY423ID1NA2BNEhQwGNwTHfwyPTxA7_eZLdmIx2U4isg48oZxR7PAvl1U9l2t30SDeaazeexVP_ec6qssJ9D-40SK7ozvr5MfKLF2bHxTjFBnglJZw0HFyHAQJcjmwc4AKsUnPFWATBckTkn_tUSRmFkkBXoTJ5VBbZdvGGTVqc27PZronArRGjjTstsfPr14oiKuTh4XntPbPteEg9MKOXkesL1ZUi-rMWv_8BTAn4-.r_411Yemx9Y7KIXxIhVvyw
Figure 30: HPKE-12-KE JWE Compact Serialization

A.11. HPKE-13 

{
  "kty": "AKP",
  "alg": "HPKE-13",
  "kid": "4xifOIawsHO0-c6lM_fIgh0hmcKUGV0ohj0aw8BQrA4",
  "pub": "XCYFhAuieqBanCe6DZR7Rbdl2kST_-vGeTIobXcQuFAwaHiqlFuwf_BS2CAbcfe_j2pZO2JMNnaCpHU618FiPlu6jRsmYUy4m7aIB_xblaShNpuzO4eL16ZSh5KtILqNB9AbAVAuLOtigWGbQ7UeBuG8idyjXROjWpgHXrplOqmCyqQInfuMHESRsGU7_wN5pFRA8LpA01dPTjJffQGwnvND6VZfN1MuVMc1-cA2c8KYoaSDFtWhitVAestW-CGIL1G2xBKT1SK0CltxTRRR_UgrpUcvm3c0W6U4Y9QTRIZbncdhD3kdiYXNwwEXEstlvdYuSjcnwlIEhZFsLNCuH_G-a1aBmfyeUoHCKlYxHxsmf7sJvXYLyQEfzhfLA8lyqZWEXRNOshTNMrC7NimiHNIK-zF9vyqFTsE8Q4a0HKIjTvdMNXaoKgpqxgUDqTQk3HUS7oIYJOVN0qSeXqeaZnweAfy972CSOfVkTEk2BZQxzBFJRDGabMIuztggAbElcLEZVbMue_OvdOCj18w3BYI-PHs4zUU3R6NK21jGiJGIWYNyxui36KOqcvceGiG3X9V_zfUIrUtvdEsQ2_JKQvZcw8Rtw2JTnVQPKhpFsDZkzwhkaHOgdWnJPqSA8CmK0ZJnkXyS2CWYBiy9LQm018sn6hm5rLslIos4SHudeZBnOpdwkteQghFkx2Ic59Zmggw1mvJyYCyDUCMXYRVkXZGPrIe-CcAiUPQV_nmJjLwBwOdfh1rPF2KOsrcid3Zv06IuvJS5R8Oj37QfAKq_LtUjOTebm6Vr21VRzsJ0B3gN2wwei1MjM8VIS0yKMwtW1qg0vaoswSKpHvtYeqQt80CGK9yYx1R5X7Nih3sGQABMo_Gd_qu4m6XOI1QZUWmRQ7RcjzMDFvQVx-hxrtfFRRgqg3pyybnJkjlGhjyeChFGtBk15wskdGRu5Aql0WYnEcRhdsJnMcugA5nDGkSOEDQh8hmjCrqWLySwuzjBBlMNrfELTQSg3ZKMMDDBCfkKIBJzKNqOSch9FIoAubQBFqgthzpbLYafp9Y4IOvObpS-WkkyaVKy4YW4zuk49aQkkbeW4ZMlwCuhhHOga9VriKs1BWIfk0ukrECDWGWisstZTdW50LlTUlZZcvKgjfRTeUmuptsQWBtTDKaP3tFzq2wNjAQJpkuKcamIbLeKfXKCyvNrDgggfQggBNFCUgYXeIjL6KUbDbIIE3qtHZB_JwNMCogKzxi7rwsXZ-wQZGG7iNweL1rORhK8UUrFJ5uXKowHZNpwI6prZknPHOmEuJO0lXOnoDs5SKxzJHQ1kPCExymAClBeO6KPlTK0x8AWXos4wWeL3JoJjvNbhAMuzip9GTofQAfIGQIENfZ7D2WYAOa4tLwFHeAn1mTLRgVcD5QRGJdU-epS2gGhvdwcbhc5LjtXXVdWeWR6YuSw7ZGdwdSLHitYGLkJwMhZNCt4muDH94rLfnhYoXPOFzyrYeKRjdFCIhAj1aZsxTBYEpqTv8jDQcFdNTNGiazOB4c2G4G7IbdK92mYdrtwMGpW3YmPLYJKNhoIVhPKrQN0BYjJUPkDJlVPKZo9cWPAhVOCXbu8QkF85LkcR-wIfuClBzlWVWK8MBsB-DaBJkQgaNVQ2UqtQhw31rB41JMMZYQQUsyCl7lhVYu5eSd_x4qTEjl7TCu6xGkqXlAPZWUO8XeeuThSR4MqwFwqhYuQ35GPSVaI3bhvlfE1U_c7kmANl4ywPdUQVUOmOHt4abikK1GOKLurRHoZpRLCzsDJifRt5jJkBUiTpxkX7iY6-HV7J1DB2qCe5buiq1BixnqRFwmOx8ch1XZbmrZZc6iOP3GVqfW5jAxHCNrC-LYDfGg774uBzsIfyHdv8rUFmpQExcRYiQgnIdxsFAdkbkeucYKo2tgXyppUjYhe7ByjOmDOStyOVWPL_0cV9dRHSnhLRNJixaefp-AuyKBHzvmEvmNb5DeW39pIFTID6VpwQDBrFPyalvJXkhiQ1xkyfGEHXkNFAdpEbTNT0GC_K7BpYZWisXF-CPBYUNti0acN-izfVBRxV7TVEOCly9H9rzUWBn0EL_Alcz4-0u16W3ufnpD1NNsYaGu5ZyGCabEGaoAgPS8izvrwqFC-2kcS05W7Am6Rx4uMxZTjx3j2QG6KLkkw3SSbaOsfVABOlArIplM1Jv7ajoAFSPCKfhOKtOmSYljF",
  "priv": "P8toumlkmiSZKU6UB6tJC0jx1pEqf2kpiawqW6x4Zsw"
}
Figure 31: HPKE-13 Private JWK 
{
  "protected": "eyJhbGciOiJIUEtFLTEzIiwia2lkIjoiNHhpZk9JYXdzSE8wLWM2bE1fZklnaDBobWNLVUdWMG9oajBhdzhCUXJBNCJ9",
  "aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc",
  "encrypted_key": "25ZgeYG8Yoyk4S7wykXmZYjAqNOxNWdqof4-kvdFo36W-8amyT11xCgBNQUxBFBI1ymkq5mTRzdeLoX2ONXjpLQngbxelhiccKeKbuAsUlR7zp_MO8fZIwRSDZTjtny0S_yURmLFWnPpdebCb2KJpMN3jn9ePdmPLzrrtW781kqYZ4CIRlAjT9ilcsuz1tQJLouCN4zjCStAMSWdnhxITe8zKU4iya1OlcniQfcyyHDpnmLf3TLEeczWeqj5sCihqh_TnxtG537JVQWkjbTCUBNbHXQb2RSC3t2pPO7rPr-a0GNUV4zTLyCc0TdpUXuMEI6zEAeYq8CcbGddOxToXSWzgByQLrY754Zm2z4xhvTvQ7UwbGYoMVrmW3LtRO10qX0bLfjXswexIDtaEhKyW0WoT0NYLylwPHoiUcDrT_AyjieS7eil9kK00kPxL1sOv3NT297iChR3J620JZpU-0pEfaQBASDQ1c_xjAvQwwBU2f7HVvc1Vdw0AXvOFwcAaZopO2Pullsi31kKuiQH8KaATrZaUlL_Cf2HUq9FHbUrSOkvG6Be66Lwa2bNERWcFiBF2x0S_i754DNW7d09Lf1ppe4rRSG_CdGmyM356-uc30828eUvrTeNvJNqLPADEzPyXRSP7hC3XTY2vKtMBc-iJmS8pjC0z8_bkL7umzpsU_HFwP9vBxSlr6ytx3kDdqz2rcxVDzptMg3P99hZ1DdxtNUv34ciLyZv_QCJkht1kfMVSzQgDzag06sYcHsWbBsOK4vTuBhfWM85cPzYK8edEqMwVuElGyqPmReTNOwzgMCVPPZ_b4jlgQvaTm7Ll6aDxGu_V4D7poFerWnKrxm9TexWen8LeujCss1HAZtTny2vHg1koEqEQRKPakWO2zkYjxqzkQOO6XnrYSd-QWKeGAy3be3yu_7OW40aszrD0ekcX6YNL5PVCpSmO_wTR3QBgBA-RMo3psfJmdZ9pJ0GkAKQrX4BsjRDPC6zbsW4JI3rE9ZXIETy5iI8qBjS2eIfmDeF-12ZjB8m0S0U6_WrSyO204S7yDCc2J5_TUobuyTZAd2fbxd2idCBFpCLQ32Lg01wbjlZsrP7vlCkXH22T9pDoO3dtDDcj9QiK2LR0-itQZiNWkFiU47817a_VLBRWhJVhIGVy3kRWdz0Na55eo1qRprNMU4sX-aFYnrCb7np69MikLCJZPxAEkw6yhx__yg3dXPdD_I_vYTtyQMPKSHNKDLIQhZWh-oBvUySlcpoctA1MzcSZCAUXcyGYC9KWEzjvbO3L4PrkJoN3A7wYHVWMP3TCi10u_xtob3_B8IqsxzcoUhTriAl6A7MK5lQdvqK99I49bQCEygOTTw8SIVVMef-5Cy3EREcJ3aV1RLnRi9TqP4_fi_XsU8EKnHoyD_HBCW5HIpa0hRFsHFpP3_hFFmJ-EWgamgwnyKqN_fIezZUFqcO-lpYxe5559WUr4FSHYlMUVz0gKyW9bKDzlwCZW3bjzm8RCf2jyWFHKilRlYt_WCCr_iFmiLWXGCYEVaL_qIOMX837FUVBOY6M__8gX2Uq9aAlxr9bjwTliJ8LTIdd41UQ-m9h1pZ6lOIE5nnDD_Jjj48REbWbGAE_-QryQVlU1oFitYxET2WxszMVivrWWjhQ2hraj1AV7U-A0bE2XA9yLoGROOeWkjoUqAW7jVhlBp_pViqkuYEwHrxwMME5w43CYOnmH4GIOHfbnsf5xzRVg9HMUQu95kGwSegWuCnI5jhKy5fIAukFTQjA0sCrJ9esZDH6hQW5MCQeS6TX56waGpNcvMSazrNKMEw8HTWcl8s8tmi82DOga93FxDicAMn5C1E4D6wJKr5V9zTk1_qE4FWDvt-fvzP3eJNWwsTya_hGGtJNazyT58NVYlAJauhqDCuI6wqwv4imX7Vo5Jdn57ibZmd1eGdr189NU9LkkhVanfMeFo_w_adNVumvUnrvYdKlO7IAr5DSDlaWOIisZvkYu3SHDed54OhpsLp8lAqJZVng0w2mFxm_kUZNW0YDkQ5CU1_7WG7FV-1nGf-hsUekkLPwa5pyLZCIkGnZHpw7imSS_oEyvyuaDg3NF2tYvrw6CM5NQXzOXzzH0ax8mRGPf5ur1Z4YtzyqGT8xooomfUbDlFIawi2sWQYd7mwa9zIbcz30HWNhEsERaM5clYfUT-DAlrqQ4Tt3vjhBzHfN6TFtOQ9",
  "ciphertext": "evHuU7AbtmLiCvhITweAJmsUr79rAD1ylsnw64hiANTM1qh39GbvzqJepSPXn7pAb2cNe0wiVwvMlP4Td_Yd_VzRgdpg57Utwt6haKKeKGHU6iBEwpl_JQS_bOyc7thJTUORXdPj1Mny83KE8xmXMJ_M5qyeHlH_usF-afPKLrj7OWcXQ9p2irz_DNEPBCDqnxnJmb8WsChkWu_ABPGZ79vzQbUJzXvvTxbfZqc5QGkqb59qygphsvzgKFCfguIsuz29gSyehOXz3poMrB1nffl53MWoGuG8ijYS6XpGqu0ULqaIR1NHXImCbKITVY8fXe-JvwK6nUx1jK44q9EqTuLmsjHoOpUGRIDwJSgyH4SaXpmjdgsEqZVtZKtVfiUYhQ"
}
Figure 32: HPKE-13 Flattened JWE JSON Serialization 
eyJhbGciOiJIUEtFLTEzIiwia2lkIjoiNHhpZk9JYXdzSE8wLWM2bE1fZklnaDBobWNLVUdWMG9oajBhdzhCUXJBNCJ9.l6iJ90Oc2GkCzuM-p4hYiVeZsiyvOiE-gG8ACFGhre0EUNxvpcKtCbGbO2Wt8U3xy9E75FblWp02_9-W4DnWJyAbRimwF2IeVkxaqFZ5TDKM1dSoUhdzaZO81DQLdOn9esI6yLNzx7akNNY3LSdIhB8tD4GNaHB4uUAmRcR5u2ffbWCeY0yB_Cdoh4UG3hDsHcnbe3TPHMyLJXpkhpZuMTSiMyWvbWV6mzG6sZo-G4Pu59-bSNurhGz3ad-XKZATJUtedj0YriUNHHdycpxOcgvqQEnTaZJ3CjsNuP4NOKCWRJnXuBiv6b0ZAvPSsJ--gNugEZiBwi8-eA6uNkxuxEjPfutqfw3ElB66iOmLumoW2XQiN2VgJBisAeDO2sfSCU19LiXMTOpjdARL8qNOWjrjKlOZd1zuuqSB_CJnqwepZ9uCgl9P6uBta7SsbWfI7JK8gsGPKu-bpZBk-JK6sFSYcTRRViYWXPj_UHuxXmqpSRA8PuXMn9wURV-dC2fes-POFMgYYBaJJV5pV3yOvUt5aeH13isGHxYJhKhoGxYUx8quxjqxeUCV3CuhSyp2uMP9D90BTffABsyROQeeWEjlKsxvMI82vumeY8kKl7Koy77-7JwJiAUJNvu4vMnTI2FPVNOCKnoL4I0MsJrcZTkGksY9ELe2fMt0BnQezDjS0YldoMsbcHiJvhwyaAqySkDbAe5V5sIx7WLb_Aj9V8XCkyqf0Fqd5v6cK0IVeNXU3Ed1VWicMx6m8yT1oE81mP8ca-hdv9td237QbZR77ZubhipBkgeUh0cVzVUSATGiReXhPRbiP0dSEzsaOFTzCSDirN_l43JZOc6PXLTJoS36-JODptyfUqZIrMuhswbahlu2GVF1Qvcd_3Xr47GLs3J0-eyqjv6XB2ABrjk7CHBblLAIsz3XxioaSvaEoLrweTE5aQ1NL_PWVWi3rXnh5uai05CfPqHq-Y2QgHw_ne0xwMNeeH92SLaH8zFH3u46uJVYzBy_YI9Z1vdo7CmTgvA7dGXIdwAQ2GqvjitHno2RhyicPCExpigQctf2nWpNMuoKUyHNS69qSG4s2wthxJoUHwR5JaWX5oRUPu-rLTIF4GqecWfpPXS00YUZWC9Z4_Q5_P1iTofELSWKk89ym-_qnQNTMlE3VQFrBvRj1GMDQWK7JCYWoGeN3ECnl8kp4wz_nqgSs30naA-LpyXBAFyXxvC3kLsupG2HenYs-pwZFxwcSyt38C5pqxJ6ZaZLHZ5GUpt4Qybx1MfkBcHg3dKy1bLafCouFZ75yumyFX9TrNgfcZVGRey3q86Xnyzd_1dTIXL_l2ZoJA2B14SEm2sTn9m-6Yy-NQjUa_ItCYYMlOQ02fAGPfGIrEWxysWLfqe1k_m-YyvSOvdyk8UNrlknUhOclbvPsQ2Hznq3ugavzB38z5NsJHNkAjls3Tbwo8x6jSRah4pYb0KXMP9Mbyz6cMJ_zFqj4R7FsHAf5Hh2sYq2fs6xmCKKy-6N4DebT2R8qPaRzbZjSyFGibSzBjUwT3w4DRryeC5byV0aEbb-AD1hKwpHJtFr5wi_gvr-FOYrpQ5o8i07rFHxobj505CMCECMdblWCY4sJ1QA67qTQLkqoneibjO-TfVt4_nD2N0Ip1ZHZCmb7D1jkL3Z5GUVVS2HA-MUO07PZ3snPCaJZnPGnCs5EoV1reuPAaHxiGbJFKoaM1pdEOkI8HjyPLC7hbZcCwaCpgkjYo_M8PTIBER629MMbSOVkLBS2R9DJktEbilwu2qTOSKH8jTg2teZ7NvVRe5TLIAbuYfgR2KA1pTV5s3ASfYZtxjAzr0gLI1nPJ2e88VatocmoqBxpuRHFsczBdxcQcv_Fx2AEh-I9jz79uktnRWHNdP9hXcgIYThKcUbxwsTxSCtCwG-3rgedypqdi4dHCZ7UAZPqeVveBu9asXfCqqmuKbRjfF7dOrguagKUa0gEN7rMuctdcjDIAXB4ryFmj9mfFveMOmxNV72gpOZ1jjaJB3Xbe7xdhVKOKe1vwc2GpL_sMgE59XjAKfsf5gs0MecOK-IcTwNf6SEYld27kvlR1M6QYsEQUdl_biL7d_OmMOeaaYxCLPTg2IL2XBscw5Bwd76mNlhPhVf0Bz1tA0ZMjyDBENBwyVC4Y1ihy5GerWHQTslWySwQqC2VM6Y6Z8IRlZbF6-H8Dz7Vnloa2Y6FQ0oifQW..P-shvFCzgdVVW5l0keplsRfMfXRY-YmYkpg336M8xK9GtgTo91-uLrLcqrenl85JkkyBOr4jY61LueJGqZeC1fKUbviUI_rl-X3U9Jv1qbGoVW_5_Qnwlh6kZfrTzYSq1o3TuAgjODrjL1HYLfwzpE7JRt-Tjtg_RCsOpT5z1Byh35Ypu-plhu95F957aKSWN9DEHUF1bcA1j3VHsa31xqaYLBVr3-d4CQwtHgzQzuwyIbnKGKVgznAQkQ-065xvSkxhdCxY81AY_D9mDJ7BwPt6guBF8Pngjrla2_wjuKsqcVrfOo_frNRntuC096SbzShXCZe5giiM-vSpi7My3i2odjprl-n10G6QYEg_jrrWPFWD9-cI8HhF6WL0E6vvIQ.
Figure 33: HPKE-13 JWE Compact Serialization

A.12. HPKE-13-KE 

{
  "kty": "AKP",
  "alg": "HPKE-13-KE",
  "kid": "0BrDfMl9Ou81OD27zcoCEKWuQVbsviuJAEr-9IJNTTk",
  "pub": "lIeR2RU7WtrK4pOlWdXISQq4tPy37ZkqmoGkTWGlIseElHjFabGZ9KecMDeHTMpSNESRf3Kn5zeq39NCJWyBnMBWIsGc2eaiN1RAzuml3AIG3_mu_BSwNAWpURZPMwBOCLVaGeerd9UU7Ux6W4UUSNxmFBQlBdB_uplDO6of9ihkBEOpbDSpXHoEblTCx-dVEEXDN7CkDLcSt6KKZ5BI5bfLHNdR66teXmqvAuaG3iLMAuepAhRQw6XCgiVrG8MZDmSMzlRKXnSdUomIk9J8Lch5o3M0iQJXnXqYODg7sKFLRzQjU1mtneTIPRujvPlwBbWqxeJP2FqPfoO3egjAVxpCCnjNYWUgw6EweuKk3YcjGcOTZZaZKdmDONkQLjfBSRZzIvk28SOfBeJWkPo5fJCU_pmjqRkMUJWiKEec0keTq3eMYeGKnOgqVvkgO9ObWzCsoQtdx9bI4eBBhVIP8vStWQIRkzbG9IOfnZRB3yCeVyKVLDO0gFyACEGncxBREzaCH2qTnpGAi8OOwaAflXGo9FCcbYOYsLBmNCYrrGw2R8ga8fZeBzdE9DSgHvaFU8m4Whq8WOMhOJiE7hivcjybR0OL0idcwhpt8wUs7GC-ESNWd0ti3wS0bTk3_WMStDwKQxnCZXxYLdPEXUe4gepUu5cXTxua_tBkXNmestLHWZqm4qsEFCCHjDoShQoI8RNoZ9Eaz1o_JegtucAZu-sLNUcPRyVSVatCBXexIBqVExA-oxWCV0ZQYsE7PxyCG3hpzihX69IktQSlcIAldnORc9A61CMwLhS17NwTJOHK7IvEtyJQTrlC0iJ0oxghDsS_HLseGdLIaUOh4uNJfKybZsyWquaS6LMXFSI1ASEiZQROTMAEx4gfIDCZuitoCRhpl2Rr4pacNExhqzAOU4keQnaYzskTJ3wGGwIcXEivpHCM1yqHDMeI7RRUYHe6-Vp3NlxIz-W769Slh6wi8pxF4zS4L-KmMJMz6EmXjAq-hCBVo0iUMma7vqhK39VJDdoxvvGRRUEfudVl96GAiAi8dwm1icqyXaMPhZE__4WqN3oSBZONeCw5C0K5fnjOeDLFYBxxkBt25vjNPtFxCwewtjG1-VjIRiPJCalWZpS6BnaBqyUD8jgMYZsHhEVOeNyk0wynv2iNisyNt6E8d7pbF_sxVdzDSbh2w1Fyz-PAjVULffcYIRohQCw1J4mYfXJc03eF3YFT2wMsHJgvOAwFUvYzXIZ0-pldQeorn3ioU1t_lLM7P0F32mW_pGpVZMHATklxjqcG6otoRLZENzMKzTHMZhBp8PBTZBo4UbtoMqscL4SJJ5lNCUQHC-AVP2uNc9elnAsRRYnHp7erXcttvlNlIVYLRNNYa-e_O1i_rAdDQuyQ5mwdxiauMCwM2TYMqlS42-aHgXQID-EZxGSSgHul_6BBLdN0LKtMQyeITzfNypZb28BbBeZ_0Figr0FMVVhKOktdgeS1-LgTTyaHUiSkU8PO8Hga1Pt_fSE52vFpX0tPjUKY7nkU4sbFheRjq2JQYCM-TIBQyVwrCCjDpusKY8mY46qRxXVsriGuRVYT5ldZ9JJ7snePgxLKivqGxSC3Ilw9PmHI1gJ8Fmdu4VEf4wgrOQQuEIVYVQk4UFkZX3wJevrLTUxprpVcamxFazG-gbeBlYOS24FgLYg5VZCk19iVMnqvZMML7gyc0UYZrlvCZnpCcVzNdYmPx_q3WpZVAycduim_Y4wQztgZVwx1tAxNsnw4h9cjheAw7pWnsHeh8TSh4JMFVDM4HTWLJJNuAEUq3XJMfjkKWqevzpmT3ut6rWua6Osw1PNdEcB3OjoLDpsmzTuPWxRY94POXfsSwFO94orDGIAo-px4J7I79qFUk7l0NzFHUtxhr-VvTGAPOxE3uSEOmQKNR9irzleuiLh82xxzp5QDKfQ3BGqFvcISj7fOZvYtufiKF-hFnZUeJxO3JknHu9cLPqBT8HV_ANUtkdUAjVIjwjkOPbNAViusbPq1fhCApMsF7YRp9dteJllx2LIKR_ZQ8fJ8z4MhCyPl_S6Bd9SOZz585v9bd6oo-B3bD1NTj9kEEkc2OVuDC3U5PxksCawjJjD3ijBJBc6EO7zOZ0DnP5PBkNMIVJkT60gJBtH5r-Py6IWmUh2bILE_R7e-rKEbdJzm2c4YsiYYOQsfbhFkniTdp9fOBRlTAlmZAPnzcq6H",
  "priv": "ab0bJL7Uw-bWrw3usR85Camu8riwNWawtW1XdVREAjA"
}
Figure 34: HPKE-13-KE Private JWK 
{
  "protected": "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",
  "aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc",
  "iv": "hAt8r15Rv6ygUo9U",
  "ciphertext": "ZhkElOeJIgqcgJTN1QOn2MOSxeYw2b0czFHp0TxD0vj9CWQDk_pisQsQYCXiQfbE8tcZi2vNdZv82uBOkAkggjVKbwFdWs6W4etH0EaYvI_55pkppZuyhfY_P1igJaCIwfm2LhFGtBhYGCqjD67i7mqMOmq0j_x0Ofg3XMQtyVi5PqF1_90NxKEom2nUFla5K55WjxxqPCt6d4zMQFCUI-Z-dBnduOyQnKK0FIgSZQASXZhfMi2m5fJ_zFqvWwE4NEbhM3hnQczDxoCQq-E4nmkOW1Pl2v3iDYPCDnafUfqqama2mx1-8OmPKL8P6UJyYXTW3Ve_5NBykWMIiJAYis4ACnS3RV5NziUex6cPEeNo",
  "tag": "P4hRMm9qskdV4TT_0D-IGw",
  "encrypted_key": "hCtP_FodNMBRK8sZiCwueCbuPG6jIq8iegt1-Kv3dasloWfJ0lQClNdFVQQ1OeBB"
}
Figure 35: HPKE-13-KE Flattened JWE JSON Serialization 
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.9fG45drJG0-KwSFjk94DnvCLWYyklZDNmWjQRBcA8iFBT4pp2PmI_J5ZX159F4Zj.dcZbRxnnrOtPRzin.wQA74WJBvOwjfSJoN1jqdjlztoZvhyLk60OK-kfHKOqsI1lB9QIoQReOHkyUvP8MswThMFtXU2zR6BLq197NBOydYsIhxR1CEbc-tUpJ8pqBdvpUUNL0PKwI9ztWhHDiCy8sqg0MXVPC-91KZmXvGmQ-DL2AnpnVm_XYfB4lUKm4Et70AaspwXnAF8UbasDOYPymTSmBXLjbYUjpuClI6YOfcBNuUU1GuIvl6Hs6uHVlxMKz4wNX7axdnLHWEtCatVuTWOtyPQsXASU_Ib7B1Ioiwkyh3my_iF9tyG5yF5FZjzAK0GwTlipJSIjrBikE-98GfW687XT1-6ivK1mqXIYOJ9EbcbA2FvPxk-Gsgz8Z.Xo5BSgUbW2PM37DtM5DGIg
Figure 36: HPKE-13-KE JWE Compact Serialization

A.13. HPKE-14 

{
  "kty": "AKP",
  "alg": "HPKE-14",
  "kid": "tTd2rviNEWmlDSv55i7bpOBkYgi5nYuGG44ptRhV51A",
  "pub": "NPoE7SUAWwcVJbAWGEAUiZUcIrAIN1UJIoR-ZjZSAvIUxKJcyhMFoeliHppZ1ncZuqqmSTCNmCM7j5XCvRRUZgqYgHgmHuCJOdMK3raAbPF_g2kkj-iRqtQJ5poXC4bIpYd7ruJcHyyf8rEytrTGOKejA7xw_9IN8VtW27ah89F-3fUGm3xidSJTgrgGHcHKPhewgnNkNprFpzqwwpUz1jlnz-mPGwAkMBlM-xiIeUlX6hqKR0xeTDGUbyt53iMUdbqi0EaRdHC63GSruEwE8NYjr-Wy1-NXPEYSU7qlLjGNeSRSxZInTarM0ulwnFTFzii7kkmygCkGDgIaeufJ7hGVvwSI_hcE5pyBMcaTDiSyH-ExcCQC3RpXsTGbvEm8uSRqCfkiucLKgKPMbmpkcRR_bqESteo-JoYrNtLDLbtifGDKnit823vKEDRpbDMpQzlNThOO-vlNh-hHIHNjCUocRqBp6HwLRTQBpkIv0ka4djEU3HVDNkEZfNAkcJK3lDQDgGdWzltRb8gBZjBrWLB4zdCxXGSjwaGwRJcHfmVTBZtCx5GAlDjBiYxhmqdS20ZnXDMTRbyh3kPFxcpNa1Ch9uBkAsLORtY2rVIdztxsmkOQ2pg6lJBM5ugPRaRCeZmUhfFFQhB9dQVQNno2R1skBHh8InJe7PNBhKu1P5Uom-p5Hll3PgVWsus4QbfG5fsykOWC1QByTCgcvewJftuc-XUtq3dBcVCNrsaOMACE60Ci55WxFtlHHpJ7qvvJMfeYkeyfGaCweFFMFOc9BbeRVaKGItC73QLPM-Fsuylr90BcXGKTMHNyIHIuSEFChzOzb4AefYuz1VZeWXwhuETOkFkPlFkVOdueGJZLvUhu9BC2bDgcETosxYlX77dbxiGjSilEI6TI-NiG5IxznwoctbxIv2kp7pUu-WdMJEiYJSCCO8io4XpqKQI6S5Zh48drHQG7NjcGhgAyGuUNWKUS9qauz_iyYihl1AAel4DL-keymseFwPk8NAuwORtPhiR671RWYNoUJvWG5pwhJBczvVCx2mgrLjZAFhaGgPJcdRY_Ymy-aQmVlWFgpkjOuaZCjKtInfJn79AMUKoLaFwj9LEaf_RYyCtlslnH1Ym2_0aIpqmGeFu4e3O4M4Yi-HAOK0kQmgUx2BS7xpfPmksEMiZ47CZMBqRqJGHK1vWlVAKbjRE3m4o0qSe2LlAUQPJvPwt3ktjA1VsyGtpROSw0-CcGUtEiHQMrOXQhIaUFebVWVnOVMnNeISpQj4gtDEkXTbUBdUqJSBZsJ3upmNqxckie-OC2c0GiflFOJjbD-rw7ORlqyaZPYqKyKUo2uEhlJYc2StwnG9J7FiJq_jLA-ROc-QLIirdxDGNxvKA8FddTCnqtxyR_y1ac9CQXL4mazTNWFLGjcmiXm1S1BSg9eYzJe_tC3FJlijSV1vpCEEljF6u8pMaRhIhGuCSPC3ifEZMzl8a8E9CkdjOug-hTWkdJzjE_vZkkBGce8vJSVelkY_mTVnO4kBqYyRmqo56COq_xTDAOFj12mqzWYsB0FfV1aXwEIThj4GHHhD8",
  "priv": "N_Ad_9j_QIuhusOi_mWxWKvtFWt_Wvw8f5pL7LOW6hepmK0yxo8tk72JwqMJNfKM5-xzI3CjEM_ZdotrjtKHlw"
}
Figure 37: HPKE-14 Private JWK 
{
  "protected": "eyJhbGciOiJIUEtFLTE0Iiwia2lkIjoidFRkMnJ2aU5FV21sRFN2NTVpN2JwT0JrWWdpNW5ZdUdHNDRwdFJoVjUxQSJ9",
  "aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc",
  "encrypted_key": "o_WkCvL36wuLHZLnwGKL7iIxcC4i0RgJbZIHoTaqDEqGdLGngTAfL-RvT36q8Dk97LjRDrA2jIKLffPbGYBp2B_vUpIY3OiIGu7YydEL5Yn6FLgkcg4R_XXpVzwLQ9z8WlDyoBEUoOCb4CHEcz6SghPybNPYkNWm3eKD786JPo2WfunxJpFjLHRLfjHkb4bHC34wmPjrbtacAJugpJNz3jHLotOCM1wH4RL6MiGrRzC8_pgTiXHQzoPIgJSS6pstFhe18U1MLtZckKFly88AmYus_m5S8MYkOmGLk6mI1fjBO2fpfTee5FVhzcD6geavYNv6Q7Jwge0lXehJQ1lvBl4aYdTib95UDlC-TLKl6mSob6dOlQjH7BMPdfA3Se_txyxfcfDSgCxnKLTmocP6zgZxcSdqsfBCbIVfjNRvQt9Ps64vQQ7c-1zEKGgKj4FMnK6vhHsfdA4QqBgQzyZPz5F8KkwYjjCOUS3N-y1FKtiQAzsGLSXWwZy15gbm1CtfVc9NNtw_iJ2u60UbexBJUJIAbQDeeIc1qeeyuzSs73sNvWG4qShb66xP70At9TSABNyCG0Wnv8aAPRXIWyI4c1aW1cTvhPm18ssMR0Q6vsxrOOdB14EuubwrqNTx4wk3x5hB0NjnZvRhHNLmloSzF3JOeBq_ToASMLQ4YTBjcrVqYQwOCoYLXwVS2VB_uwqUwgmBjCwlFvghGQAinKEDc3oWadF3yx0GI5ifyTMctVCo5O7FhkZQ88Xa6rJrw6S4herDuwxqWLbptamRQ-w1Aw0Ro-dMSqFzfD03k2bslWDOotdCH14cqVDZUoa_Ttv_u40NCtrNzm0jkBsfxP3tMN5zkOLpgOn5djsq0GpHl5_TWDuAbiaTYnl7_4s_bm3evJ8v_1IMKWJh0SV3b4SkW7fsR8TdDW-ininL4c0dT44_I2PcqjxSA7rCv_f8AyvVNmSFYXzO3D6PgnQ3hpy20LRFut-8LvmVYUxxPE79yopOibXvPRSNqksUi2_WMAaRG43r6almBuKjeab47kOHOVN_gyX-2BynU8kjUchgqDkn29OPSpFabZmcS3hg-XhrSLM4rqEzzyeTa1b2a6hfqMwt7VMFm3ikUljQjwfqWxAYpCDKbRSFvTIELpRQt_ruSa6VpPfUrv8I-a9eHnYjD5JcgqEzMcGVKp064A6KNvr1Qo0xgY4EGobxCAS_oK-uKCbHaD_7sRRQNOIXUJYb6gwl4VyMWmNRmae9wJUZcAKwErVj_1WMWDCUQw_-6_2kBqxR5LBtkDkfBLtXjpOUus4rWD_JOZ8HaFxjhtJCT9RUa7KUQz8pTWX3TAvHvrBMNVe39HhfdIP_YwaqzPzFFZR03YYssvUMhhV5-o8hxqRuUayDQs-PONCYJYW6trtQvz5v-RmJNuXwBIqwnjTGqVKiaz79qwdqQevMMb_WA4s",
  "ciphertext": "6aJMWpn-x_Yc0ltWt50xOGyCyNIJOVB9F5P3ImqDWjFROrlcxzlN-P--Ht3CcFcCbghu7qPPya3Rl_eEQDi0dqj-YuVB8Iwm8hYD_c7Y3NALHDOURIDIkqG9jLo4vDenlu7gxTKfAKIat4Vj2hG4r5DYOBC665aj6wHkyI49ZdpOdL2jUj5_uR5Wbtf_TL6VxNYEP0nbQJ25znOqq-fO1IoaZtn0nOdV88g2vaX7ybGCe11jgvr19l6Ys5TGU7AHrUO_WC2oXak8pfxFgNP6aDJijj-PmwGyCOwAZJ7S9kqC3X0iUZi54phqfOGJM7OZArv_xP6MfGaKqtHbFeSXdUilu0m1FpRk4zZRMDwkentztQWVpoWUZ-eBD34Kqgmg-w"
}
Figure 38: HPKE-14 Flattened JWE JSON Serialization 
eyJhbGciOiJIUEtFLTE0Iiwia2lkIjoidFRkMnJ2aU5FV21sRFN2NTVpN2JwT0JrWWdpNW5ZdUdHNDRwdFJoVjUxQSJ9.ZP5RugHbTix4Mt_Pu4A05QRcq5CpMyItvXR9eoC10M-t-OYq4nNtNkHrJSLyS8jquuviJ8bxPpY4SnGjt6V4al28t_ErevUqxrxwF_vjHcGs5LOyfLU6EA7Gy5Zc13GDrnKegBAYph3TfN3M8TNAgJqfBuV6C6UB94CrWDf4GlRyt5v3_fBIJAg2RBwH4wxlwX7T88iyhYmNPLDo0d9WTVZ379Xv2Af8K5HHw0wvCWQRn-0pbSDTEbIzu7fyju51pIvhMYRIWV_mtF5mOqjjBPymu8Nm6UL3-mN8kuKDwfDEnjBMZnpi1frhB51Akj8VgyD2t-5F0YCZDXo2khfRphWdfmYljunMiq3dEAv1BtPaEPu2BUKcEPJEplo3lfz3HXZowJC3Gpq7GPrEhu-5ra3P6ZE2hlNvbdwTWt-c4qCvYFZiyDaRB-W1QwPC5iEyj4AX4zc8sBWhqq-AIyJrZeiH7VXwWOYD_cajZlm3Pb-gdFdX2Xej1SAgQOtCubTyR7OUs2DDNJcalmJswl8nHLo4rjalAsC41X7g8j7-6w7LoAb9I4rgvoWf0p3w_nja5PvajoqZgvERrYDhUwNqgJUcIWg16ucVhYl1KwJ09ylHCmSC0Q26nmimQ8-ty_ZWCiuyKwx5LHuk3nqzBzCIJalA5JdtK_PyZ66nCy7yq4oNqpKbAxEUliKflxiT8OexUW8T1f0vMcN3BCjPQFTxXlDkggalu7-X6cfxz0NqImJ0sAzZ4glqhvWOEJZRCHTDq_uKacUUYx4EhMls7XvfrHUcVtdFZpfNbE5SF_O-L9e9bEe3A1Q_XeVLoq4TKycYTSlIYEbxne-thzbCRsbfoU2ZC4O3AN-6YGonVizLJcuAyKGP4LgTRjgmGKAO7hKs57x398FHGmcSWRPLBcPTsWkgiVfRjv-AZxRh5A5hVwR7H37CjajMey6DLxLe258xEwEp9aUvE47WZdt1LvJo4LxL0TXddCXl0XLGlOM61ULP8h7EGD9Ju0BNaUHsUgSoUii70UM4TNE5QhGpLi7Jqd9H9ims725IzB0pChrpIWd1WmRhmo_pbqn6_8RWgiJSc03_y5FBQ9zdhzJ99i67j8pWFiw7yXjEcYCBj36znvgS8HltSxsc6j-ECIbhJJZQdem_8TTKy_wmmFrTcU27AaiDsBINSZyBTgrdWP83zRfkr4HkOJSuaTkuw3NCzHWgMM8zOEHD19hDT4x-N8jvxaAlp0cjZVHKZobIvSgyCE3DMSyOacltz1o3OTPbzUeT9FTXUEqUGLT3NTdD3Poe9-pINQgek3uNA3ihL8LBlnlN5NnJ-bKQLxAdtbCyr0xnpJSGnAFXrANyE6eupaCWeRPinlUTjKfnZuEbGpvtZ7xv_Bnvx-7Pt0ecz8BVWiUOUtaMT4PNMoNZxCe3lOXVl5aeH33TeUdWtlNiQ0A7Yns..5zAVwDsdj8PIEMWvwGbW0enbH3dPtmorf-e0mXFuCLF4W46jVikY08EhYgl9MfCpdw6TsGMB01wqIQeKNeEXmSutrKzv7Ptk-c-CnERT03lVXna0tM2sPtfc6yxZdCoYaKLUibR8iRseVFYgzg5s8dpSqbl9om1wryBrLIjaf-y_W8WWglJ73qVlANslgJgt-TDuLx5Fi1L9NCfB_Sp3O7ZZhoLlH0HwKSBrMNPVti_1OrmtA_51rQYVEer6WM9Ppy5aqnGrdYC5dEhmFbgVjia3P3BzETAOYxvPI8o48yRKReu6GXPxZs-PnhifmNYEYNdDjR4Q3rqA-MLra25SEh7W5_BBDzTBZK-Fooa5-Y-5PDU5xgWhae2ErXsNPJuw_w.
Figure 39: HPKE-14 JWE Compact Serialization

A.14. HPKE-14-KE 

{
  "kty": "AKP",
  "alg": "HPKE-14-KE",
  "kid": "7BWJHphdDp43WeKHRiCJq8brdH_QZaPcqOdxp8Cx_5w",
  "pub": "RNNzFVw6RPUq_fEOf6KOUuy1ykikeZbCkAo9LCVr5CkPIEgLS6wRNFORcMxlutHJUkLFl2PJqDG-qqGgeWknYmhqfxZyrDW6mADI5psA4lFdljNeMps7wXyV8hW5_gJ_5xMSnERJUraHGYiIsbYli5qTMfI_VRk0l0yT_YlRfJQbB0iO0fhO6eu8gnQI0ICLBjBlebwSdpKfQ4MU5TVEZfF5XcY4bvtXtDCHPCKjf4U5HPanLokYXZkRIdMJbxM0kCcG28i_MpaC38R6QKgxiNhjCZQdfuS6bYlJCocupsC9OCYKnGcpjrCdVHF7u3lAZPRwRjW8aOut1uAmziihwngPP7y5C1VF-VadDGk6FXIKsKEQzcgG_6o9koPCdZkh4JVzzSShOaZrb8C1HxYTp8ZC6sYpVdmZXvdtOOhMUAofwSpOAttN3gk6y0cWOnc8Jfs_0wkDhkl8-yB7-oV1xsSRM8c1wioyo1jMTuc2kBKzB_aLr_EVyGEC3vh_7VhkIUJSpZOQHQxyTylnYIs7H1FzuZSBsodirigqi-OPelINm8ZKMgqxoAdqocMYIuPIaOiTHPjHkWLF2pde9pJI89oqdSWE5RXBfcCSZFAGZvYf-YdZHGR9NAcjzUaz-pkbnVGTGQWylloCgQTCe8EPUnImW5RVYuA2TpuzOWutmkFeXEoQzXsKb5XGdfQZ7fMQitiuIEtCxHNqeFnO1HdM3_sR6yI6mliakWx4qNwf98k7YvmZufQuEHXNaSyXoswFa1inD-iJM4wk_1jPQex9ugR6fJF0GSLI23QtNkQcOcEvhoowqIO_fMB4RFAn_-KlS7iZeBiIN0qVR4YKgiKAsoWgRctPbAqGX4ecqRnPKvhmw7g22zcNF7cW9CwWKEEeX0qR2ORUlYRaAys7erNh4NyT3CURykmcuyhaOyGoR7ObO6IpeZN_ofBg3NAeXdKTcoxd5sdl3dNJtUpy67Qj_GMws3WwAkye7MVD6PnILwJIx3sKS5dp30SlhPODg1IGPTtQDjo88YMyMXkjzig9_TiMO4S4L3xJwhMAnOBwCOEUHzODC3wgVjskWHavg0WsHKgy-PCzYRGS2Gkr6cQ9yCtop5GbE2XGv1UhjUrOifeuGtAsvPc74LxGB7h-iRSH6VvEo0QKcGcYI_h3TipOQrS7S3oq-Fx60vm2dBRcxYTDYmWfTiloZFiSY2K112hdbYhFuvskRdMrdwGj06oMf5FS2BtnIQlGRsokrcgUq0ITD-urnEgVHdIFd9hPlCG0LESazwuGP_BIsZczC7GsfHHGf6A3wcuJzghdCet-2-ay3Fm4rPU-d0Bm1dS1FHOIZSUwpnZfcOoc-_xRnetWxQA2l0qZX7iOiEdsgFtvh8EUDERsKnSj4YFx-wR5IKQ7c-a8RUgemhsJNbFHTpDH4OCGrplKCySkZgYw9fE6jqyJoDqCadMs76IjG5Swp_mUOiUOuZmEWmsMtKUEPmNiNfojEvk1mdyP3eFZazUnhHGJSKYM7zCv4tgBAWxgW2JUM_qMDb-VNEAqLf-02Htt9uFnw1Iuk-sckMHfcogpKPU",
  "priv": "Hb3zfRRFdGQl0I9cMurrDBR82FDNmkbxfC9aHBfAbOnCOYx-v-uiPuHxc6I4s4tIxmusMpWYHtAh5PCOekQgqw"
}
Figure 40: HPKE-14-KE Private JWK 
{
  "protected": "eyJhbGciOiJIUEtFLTE0LUtFIiwia2lkIjoiN0JXSkhwaGREcDQzV2VLSFJpQ0pxOGJyZEhfUVphUGNxT2R4cDhDeF81dyIsImVuYyI6IkEyNTZHQ00iLCJlayI6IllIUWRlNzdMR3l4eHpFOXFEZG5MZk5FclIzdlFobWlGTnJEM0RFaVcteTZzRjVDVE9BYndEV09yOGtnOGN1Rmo0VThGakl0bV9KTXh5ZU1Sc0d6TWxHNFVVVmxTc1N2aHRUYzJUU2VYMEx4Z3g0MUR4WjNOZ3p6Um1aUWRzbS1IZW1DdlYxVHoyUHpsZlpyWm1KRWZJaF9qRXh5bHFJQU9VZnVqNHdOczlZOUpVQ1RES0lhOEczUjlxU2lNMVdwNlJBeTZ0UHFOc1d5SGZoX1ozWXZ1dUpJQXgxMkc4RDdRMnEwRURJUy1pbnpWeE9NOEpKbGtVMXdUSlEwTEFxeWpTNlRxcURtbVN1YTljYzZaQmhkM3cyMVo2V2NoaFBLTXdYTEVhSk9aV1ExMmdHTTBwRG02bktiQmw5QlhvM2VKQl9zOFY0QWNMV0NXTnR2bThwcE96V1RENFdTREtYVUZsSWsyQjRvTVdkUXd6OUhMMUZPejY3bHEyMlA0dmZfNFdRZzZSMmtib2pMc1lIUFF5Z2U2bFJsMWlVLWI3Z0xzRGVxMFE1ZnBzSTFvbHZuaE9zbllxQWVuT0M3NHQwMHJSN1QyQTA4MXJWZGcyZVlIV0dUSzdwUWszckZmMTNJU1lyaHRCQWJ2OGpmTk5iUE52QWk5RjBycHpYNTBKb1dQYUlvNTRtU1ljOEozWDlRNm96Tk1qbHVFcWItdVdneFZHWnhtS21kWktpcDB3V1R5blR6WWlXS0VLQkhhMmVHbjg4ekV5LXRMMWYweVh4UUQ3ZmVVYU1FR21YUWpmdmxnLXNBUmFxeVpVTEVaTm9wc1RCWDVkbTBSZWpUWEItcVJnTW9kaFJMWm5lNFBsNGpvWm4yM2RWTlF6aFRhZXRNVm5VQklNNTJmQXlSdGFQeGZncGpYQ1U5MWo0SDQyeXJRQnpLeS1CRUUwbko4M3BvQ3ZqX29vMWh5c3FhdkYwalYzbXo3aTk2WEVtUklSZ2VVSVFyWUZpcm9hcUYwNnFaOXRGZDJpZ1R5QW9SNk1vZFJIeTFTOWdGZDBLVmRtd0RNZ0VXVkNzSXFpcUwyWTRLb3JnLXhXR25yVmttNm03YmhmWG41eG1ZSk41cVhsa0tVaEtNRmR6ZUhuOTIySDQ4UEJPb1FGVVZRVnlQeWxldS1PU2diY2hnUkRaSTFfS2NYckxVR2IzX1dsVDJ4c1RsZlQwa0hlQ0NKeXI5UGVpUnFNSWJOZUNjVkpFeDlWMm8wendTOFFGRnNhcFJBRDJwQUVzeklWcHZCMjdNSTlhOG5PTTNmVHRuOEZ0QnA4ckZzQWpxRWFKa0g4TFdtN2dqcUprTlJXUEdpYnR6ZHBTT1htNVFhWFp4WTFRdEgzUTgyTExBczRyNTNtM0o1WEI4ZjZMVUw4bEhlaEtOcVRQRTMyNUw1aFZFa2R1aWJTQ2VFUnFPeHZIXzhnRW8xU1BiVk13NUVmZHZmT0FCdXZ1QjUxbzZHY1dVUElaOWpONXVQcFlnak1MU19lQUFaUlppY05QbURwLVNwMUpfdm44eVdFV25HT2ZUOFlpM1dFb0Y0LTdCMjRvZnUyZS1QcUEwZjAwcG9rVkRZd2s2YV9pMEV5NkJMNVczQ01TbVVvbmVJbDVsaTVETFJLMThjbHZRRFZKMzZrZ3Roekdha0p0U0JjWllSSHVvYW5ZQ05GVmVSWVRHWWpXeEJaeTBJREgzakZEY0NfQXFoRGhoMHlXTURhUWxYWTR4UUhWTElXc0Y5UzloSzE5cnBBM3U4MDJyYTA4R09aMXFSdU1ZVEVkS1A1RTBYSjVxUFh5UkM4TFlSRGNyTGktMmxwczdaX3lvRlkxUDd6QTB4U25QYmZiMlhleGpkbXhNdFRtVXpEU1FaemdIaU1Wd0FmQVVKbEsya2FseFM4SGNxbEVvIn0",
  "aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc",
  "iv": "pMkpDTKo8w1fQKf8",
  "ciphertext": "A7KIQ8cBai8seXDfYlswOxAi8OVFsmbd2NZQGdtIvHsBNtGTpRSf3IFM2QNSKJrr5J4rvwaCPEav0dgAPq1vdjGYzVhgApvBu589G81UGJQz11262vqXn0sGnsTozZSKZ-4LfEobLiZwgLLOL63HtaRkHSUtv8gvti9zsq9oG0hTrJOEsq_vGuzNYOYR2CH-F7_StQlfg122UYFLASE_WxAf0erVHp3nDnJ6dU4oEtCNAd2UXot1DKzxBPVsR4BCJFmNkoJl4sQ5KzZDUqo9alghazaFobnvJjiLZmMYG8qZ36MyBSTmbQLfjOM5UurtF7fMRWkPlkadbW4Mcu9AiDIcEYK7XsdOLEI9GP4lTHuw",
  "tag": "lo85SGTZM7L0EtxiLUZb0Q",
  "encrypted_key": "MTvV9_ja9VljRM8jFxjnbnQYKi42hsWU-ym50Gh73e7IcBJgpFcdFLREaJs74TO_"
}
Figure 41: HPKE-14-KE Flattened JWE JSON Serialization 
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.pUFBSTN1UwoAcUmaAV_Y-BN9JkIIO81rjoY_J3WOCLrmHFCD4pOtqbxz6qXabi7C.m0qOIOM8WLG6BSlQ.xRhjUVCb4iDeoz35EvoZVPkXHPfEFCqcem_OAsdoEAjGfL_SbjsUCMEa_WLo93oY9FGJ5v4XvqkDssgRejSk2CHqZNTKsCl7kdpGWpAdVmpspfriScs1W4rAdwS51ezAy8WEbtPeIWsqbZgD06OwiIh6q2RW0XyvDSkHxD4kFr6cW9bsKxtsoXYRcMSwrQ4R5InkS7s_OjdKVZ5WBl6_2ebIaUwu7YxQs5R_PTTUHVQjAkAUq9Y4N5EoHbyyLJ5o_42MHVmef5yEgzxYPuI4BpwChUXAM9kgp2cy0LzjsQx0qCTraLcF4eF73y7NxSLsW3kHFLx_rT33JwmNrOGVdUbYRhmRm2JXc5EEXAChvvKE.8vrAlP5KTXVBcojU-vO2dA
Figure 42: HPKE-14-KE JWE Compact Serialization

A.15. HPKE-15 

{
  "kty": "AKP",
  "alg": "HPKE-15",
  "kid": "ZGM6NvYI58WstMDq7U_u7MEL5ZJf4aswWZBOyEqVIHo",
  "pub": "2qrLZycIp1uSVzC0B7Nck2cweEC4OFZmKNCYuUZWymnDYPCP3BNMzfgQnaoIQei1LVNkaEQwDDNE1Eo_dtAN_jwf1wqN7dt2t1aH0ds-syNm6bsqjugwl3mnhOW4oZOhEut-YGMQQ8wensFWFPhcqOSdwFmWv_S5aZR60fYt4ggKS6eh6FcKbdOMEcSytDodKhwtSbkuEHuim5ZnNjRTiznIo9vFQzi0C7BZZfNF7-A0t8l-2wexEPpxkCVUvmxoK9qN9xRT8RRHNAF6__ku_-PJEdMkHoKu9aoj4leu03ZnT3ZdxVkmWrldg9NOzXNXkPe1c0WUPUwfJyIhpAhP-3WmzIAQhNAaAMIiVLZ2rCirKROl6PFTC6oRwnaYEMhBgIMlUAxADjoEVgpmlldijfSOUahOegTCvDLBz7XEH7SLiXBpLrIoOYgFSDmFUbcLyNO0mbF2sebD23ezAFpVBxY95pklmMsU0tiyi2qSU3F3Y6OxIOhEDoCiY8tSMSxMWVZ93wwQUOtgyaUXiFqTXbN5g_dd3BJAgltRa1eqb3SH__Cw-wZDdtsjGElT1lgGiQm2D4tJb8Z86vIIm6STRKzL11YXZNunH1miqdx3XGiYgbcLXAABspS6rqE_yAaPyNkAnGKh46FilDF7DzVwMFsaLqgX2MFvHgIOYPR0JSMVYDOFINlxziZdh1NNn_Neb0og23KfBBlsZEBJA-mG46Mv6Axx0YOsx8QhSbmie_ImEAQw4DkFnVxabqKNWWPKHeA-soQAr7IcjnBxZOudwIo6qENjC0JNf8K493Ngf9wzCKohE7UJYeVixggF4Ykl2Qp0eRKQdNGygUeSV-SABuuvbQJNVSdjmqGSlJXOTds7w_KgIzqHPOokdrZLOQyC81hpeVwQJAGbmRy6oxUq3HTJ3IepPCJ1BMxLQkIvsYitbjMlH_sKlyEcYGpS6lwI2qAERigUZDdHWTm5swscXbqMzHUoC1J7DJeONUqh6PozHNQJqRAR2WyvjYCm8AkJv-U1l8iQ8UtIjoUI9mlCQGxk_bppX1aKfutIugM2GHfBdBiwtYvOrTkNibxev8CQfrVrLwswTto4NONqTtkD3hFjZSlao0OhhkakYRZf9KBY8TmE-GOQ0VIlNmVFH8tbPgw8aHMVq-EcodhWI0bDxCuvcCJnESgAVBq5kbRrohYPcVghF5lqN9OEcGbM__FsxpnDT-oVirsMHWJdLbkH6gRizTtK2IwijKtxNeI_u8cMtFEbJFM34kgW_kt4YRIipLYWTrC4uQWRN9mK29QPj8lu0mpfnkcMaCYXljLOjewlPaVoeNmKgRLKi5lzFyRzadiiqvIVbYiJxXaexua5yblKyVLJu-axVye0qWgqOgwA2kG-8BfFRdONyZAnwHs_riAw4mElIsQyvNeUyBDOjgxL1iNRN-tD4eUrbkdN9CuCI7QddIsqn1I-IclbSPnPapEzfCnGlpJWryiamCICWbyQmpUMhVpb6dlSBGB7YjN41CgXCnp3QGHKzwFf6yKYgZXI0edmG0UWdB8KXsL4N9BSZ7c9Sylgcgo-YYDGAF4",
  "priv": "pdAf_z4ndILPTG3a9oDpluy85vzVupYFvu4GYkJXgOBpm1MXuljgxJNSscynZ75LPSl3hcbGhGEeerhFmksIeg"
}
Figure 43: HPKE-15 Private JWK 
{
  "protected": "eyJhbGciOiJIUEtFLTE1Iiwia2lkIjoiWkdNNk52WUk1OFdzdE1EcTdVX3U3TUVMNVpKZjRhc3dXWkJPeUVxVklIbyJ9",
  "aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc",
  "encrypted_key": "dkXwmkS5DhliGgZoKYHpbsA7qfhYz8zPy0ijhJkWD1pBW2rwArljom5CmRZ75DklCA27MSQlB2I1U5avR7jpMu7Lo2V4sSkf-0GEdMbCmujnKwu-aIJqBglvQK20yyMvQJZ4uVQa4wagxEwOsxcjMFx8waRNjb_vW8DZqs6xoSoQElBGnh1LKxLh3iQhzEye4aMLZFz3UjBf5560JaT0rnYVNP6IRMo7iZBrsXEfPw4G9K06BHaozG972FBvPwrMp60pwdmo4_pEsajlothC6rsd9UWLKBHN9cK6UgPmOS6u2nd01d9eW6Gu_LHJ92tdLT-q89TpnteJiMAaVnVqqTwrJ8IKYfOog2cbYDvg9PZXbF_dQoCYf7t5rKX_aiTgIxtilhElZnlpMyZwg1Y-qGwRtV6zw68sv37kNuSSW1WfiIX6nBZdI9qRYqRYsZlNhSevEbD6OyL7b6fhmShhlGcswSzaj3ut1nnBnThJnQbzLTzWWcChm7YcAgimEClC9BZyFP3WO3dYSpCfgrB-7V_3m9hlLqdRYdNE5WZs86kgIApkFT0h3z7pR2HxYkx2t2-Gf_fjN5x2IsZ_cKIrzzTA46oJtD9sXjQxEFdlHbQxHrtgsTMs8FWK7QGmC1QRlKnLme0dye8z0ri5ckJqg-92OhmWqo0BLB4LN_HPgjdRsznlcWmDDLsKyZT5x9YBBlMXnn8ouV_NI1gwOkTtWWolyWhdUt25im2p1gqmHLlD8z77rkqwi0RHxC58sfSD2p9oUpX8xdESq5KQEKSVyI-U2uU63lNFEDVsZxptInwPv5JM4JmInQmTsqktSUFBI1Pe3ZboeabdpZxwKBCO2IR055AUFDYQykdEHsiiSe8TKT13wkc_Jn-pImrYtUDhYOk-V1L0Jz5MHyIusUjjKi_5netW_tblgKWR0tKh6Bokcf6sNy9d2nFKayAiLw_mvfYLV1W6BErg5sVWRdWkzYYMtDse-ssc57A-PAMj8LuuVZpkpDlqWWeVLp3iNEg8g6t_ZrNvyBnhPtGXTg7x4uew1OcE52dTCnAEqOk8Bt_ld1Zywtk7XKieseSsbwq2LuBSQqiDJKLbJTWUg5ec2PPqvJFhivSpflamdzBqFKUCrLaL36PzVZFiQ5SXRaxirTYnOioA7kCUY0LHSkZMcfhD29HN06kF_8o4G69ErhTvdtULzDsVD5SBuo6hDXrP6i-q6u9iFLe-2gq2ZPBzHCApmfzs2HuK2kQUDqI6bycRb4Id3lSxuE-Pko8_qmukMxGvGlqHDhC_jPpcMo81b7hzRVDVFl58aqkc2m2p-WC-_lR1ulJAS1WATcDExEOuEWtZEG5LkVLLSdvrz8gbtDtZnMxbZPi8DEsnJyu2BnlAIKMHLD5hbOcW95YcKDqhR6pdgws0xn4S999mYi3w7X9QdL2IgbMEwoBi9kHZGLs",
  "ciphertext": "w6dLvmV0guszLYz5Lfd1oJlYHt-6MH2LlZc9kg8zSmAxWAJe34Or9ezbHFhdCNrHEMqsep5iFWEcqfpgrelZAJDbg9dl5o7y8mdy3iizKTMKRz9G7SSrOooux7K4NIhcCHqQhthPicSHEVbb90as-e5wvySNzbOp3SKSmf1NJ-dWkQctl_DDPVE1s9NCXLwqKOdMCdH0MBZrhevWHDe5nzD7SmMMEp2ZkyY7DQTU4HrAVZ2d9rgDYrcCpwYGq1FiklI9sEOJ3mP2JzaGlAWC63JMDeI7DinKWVBTjgBUqOyRE6Q3NAZFKzrNt-F6lxqCmXCIGQEjOcTe_QSqFtXQr65j-Ehdm_zgQaonvaLx0ZSEwY70fwPIX2VzP2r1WdAiFg"
}
Figure 44: HPKE-15 Flattened JWE JSON Serialization 
eyJhbGciOiJIUEtFLTE1Iiwia2lkIjoiWkdNNk52WUk1OFdzdE1EcTdVX3U3TUVMNVpKZjRhc3dXWkJPeUVxVklIbyJ9.F2le5B9l9Ysnrf7DAF5rOIlB2yKNcVJ1e3PMRLRz1w2FcFGBWiivrwmmCBMo90s3WrJq-aHEGSoG4IzUIdTKnR1nQyy1E8SbQqV69AeyFZE4r3k_Q8khIbSkLnYdDpBV-SWuIxOmlTTXuGjd5TIAoz1yv4stjqmzGeBJB-PCEv0Ufhg6n2diZeKgLRvEcdeDipQ_o1dowSqTDWEe-LYIu1lCwL4IKrQdHsDYnb-K2chGFAlpGcqw40P-McEPihI1xWbjOdnb096txeU6Xd0HxV4qOVVVAm73Tzm-_5gWuBDDyue7DI_SLXNiPHG2Bisbx-M5YVrNRWpQSCXjL8yg2h6J1MIzpEGa9ee7JVkBZcEwfUSK88j-1BNmk-2lkCHcen6cTDI3VbbWheA90XC5TqSZ3WxoLpfPxhGSs76c6rZ9gP_d9CtDTxg-SDwlvJJx7E1gtMtrHw6CU4DUK2YJzo_9_ITZjuMlNrRv2V_t0TVvNROwYLjkzwPaXyG-EY2XBngtc9yaGYFfd7-AkxbRf5iokUkG61etVvDsEXb2RK9XZIH3CyEeyDWxCdVKW03vksXKnQgNBQZOz-6Z2O0Ir4LzG5auKW_W4uf95FZ-Ch52AR56p6WQmw7d3eofUa1tCYxjm_2ApqoCm_hV-83kFyyZy8YItBgiO7lzdZFq4dDp2kAp5VQuPg2j9noclZgheKAJ1M1_XblG43st-L56-n44U6ouVDhbDmGD6RB9p_H0cCMlrl1nvzJ2UAfHCP0mDGWqzLxwr3YJP1FBuLqtPBMQmIStbS5lDFnXz2JhBRQ_tiulR7AXPUVU5lMvjBPfzKTUA-O5NfOXUVmG1M4Pl2gecTJHiw4kvfTsERFkvDq99-ifQoseFVYJOkmddeIwZYRD76mOfrkAcYzTR0yWjfj3fgy1R1gHSURktDVgdudrlp0hAW4QFK8cgPnsv7d1cDz-NjjvFp4a879nXKEc1wb8Vd5g8BWOVDBOu4CWqMcXB_Os6jGhfqboZ8aeDOuLvfsLuYro2V6XyJs4PYGURwz67IC8TvcUzmKg3vMShGhjU9WiZtHGAZFx9bgADtiTll1vcbgL6zTnLb0rUOP98Zb6FO0dPIaWeEDwX0I_NGN8JEHIP3Djb0mRj9-eZWnPOmK1BGV6AzmYPm5PX8Xd872UqdxoPspfvipHVg3hVsHcrthYV4HEKujHkacoZA3FkTfpREjV4bly782sRsF7IW7BHV6KOJ6c2_vT1dpiuSNmjOBInMRqn_66QJbfpoFabtCJ87grjo8hAs7tQ5uq-EIwNiZaU2z-_pP4qVazzYRHW_IHRJv81li0hidylgd7D4FkMZCEsyi2H-hQqEtA04rJx7gj1aN3iXUJ4LJ0Y9to_sylUM2y2mRCHQZnsLhx3N6fyqtacpj2G4PjjTmE8UIRbu28vJhVJN9J_xQBlvo..PQ0C50veoY2_cMCxu0aF8aougc8tboxxViqTTtLXeDutkeh2YP0r2I4hU3Ps-N0FG9t9A6cib7C7Cr1ITU7XQmBWQ75ERgstD4pkmTRK_uZIV7jVDY6h29euM2huhp1-hh61EngbPVdkiIVPvjYBu0m_LdCuMeqJ9Zmuz6_AURdkA567Jz12_xMXRpHMYliLl7_kMzChtAlfcN-_nhKrOizFqwd9C8Sx1eH07P8Mg8mmHObS_9sQblgmKrB7-NZZrGXY0QQ_aCH0Gfe56ZB-THZFm3RzgeF7jxlrds0haJTPyTTbu5Wz5buRRgqY2MCBjFTRlKVigres22kAvxw7R4Iez6PrPMHNdkB4dDZqcr_Q7Gk_0moYoMYbkimOWSHnbg.
Figure 45: HPKE-15 JWE Compact Serialization

A.16. HPKE-15-KE 

{
  "kty": "AKP",
  "alg": "HPKE-15-KE",
  "kid": "hRKbl6DMKnXFBvYQNMKY7mVem8y7bZyAvrO-iwa1KMs",
  "pub": "rwWNymaOwngk_VwtXcAdmJVpdtSt-8K-nUAeLua8q1GrLoHISveTb4W2lFug9UrIoaNocuZcnhO5oYcj5yWr41bM_BFGoOgrqkWF9gHAa0DP4lK1ZrlawfyrNvaYrrtLdKxj9PyQFLHCVgtMs-JDjSdFhmR28UMkfFYCZRLL9SlTJvcVtPSWMdSnv-R8tjazZcc8jMi-NdfLHSGOFOFnSPcKoFAttYm1nis3glocMySCW7ph3zoKa9jJ8jR-a4cfLyBmqeWZIXun6xYzmOixk_G4HUPMcQuZWKEXcjUd2_wJ5jRb7FYoSIgBkJNJaCAx11kmn3JYfAuR6VMKQfRRKyioBnIhB0a2hqgnN6OSXqWg9lgvSLx1hRkGWcMCuol93YZGiLuM-juB97NMXBhvK_ERCZu6ROm7LrOMICGR3GkYqDRnuIxT2DR6v4GP_9ECzooNVKmgEzzFlnd8chpVfTo-vrzIYcahCWwYDRMqB9NnQuVR79kwnbZDv_xu8rIoEKm_xMDF_DAwHntp-hIf5JiN8oPDq6qzaEoDAEe9QdB8QDmK3qF3mmcV_WCdHbO5PPxKrkDJkcMUHCdqaeW2ePaXO5S9h4S9_iNeFHNAzZxsOgoelDepfWl7Kcxd2hEak2Ifh_ArjodwH6EAvXfDr9k90yVinUwJPqAboriuKUGxq-ZulVsEGHdAfbeu43KcqEI4JdCH28Ar_nutKEOsOXltqehFGBRL3dY6F_agYKqxZIiZFbcsTVqkwNvHLda9tig3m0eZuRAdoTC8NDCe2qO5y6B9EylvoaWpqliUuxVEAwdUzYsgWnzJ-ZacylpU_kOqZvLNvXYpNMlyvGuC12KvEHJ0pAJNZqw0-5dKhdk0dwKaMNqW7EE1sLNhJFuNUXlkgQsLKQNGlQSzQagJVmdx_mmEn4JZ7vxrfEtwJhF8XGCeBzQwxuJjrMFRUKNWVWpdg_ivU3B5B_NQgGCfHOrCYwtbn1oP0PB6n3mTYterxyudlYQz-sEMVGsyHCItJMvCs1AqfNiFaAUfPCELZTQOegfDeFAhbImTRNk-LCQQaKgcobiFCxZoBhVlQ5p7oAV6-yGUr5lZMYS3I9udJOVM_myr5QBAKGosy1VD9Kxzd4vM7AqsHjQaliWrl6lzzDKWowWrrDg2W9J811IbdAOaHCF-EjrNIxxzGgZCDaaf5NRcLpC-XuMbWGhDDRF6G_fPMxE5wCTEXaMtWbRHCLmagaeOzPAK9MbNEFGzwvvMa1Ing1d_57NmNNIJ8gcyRSJwVSXDehdHLxehROYZATSPliN9SHEISYyulAJeozjMuYFi5XaP5yyGKQeI_jxULnlEEJI0IglXVCEuLgzOqoQnjGSO51N7RNFLkisju2EbEXeUE-EniPe0i4ZOYXSK8dR9arE3kSV-b0aI2qe146WPYRxJ8DpSmQt2G8VYNCG6NuaJIQVKp6ewdyIYYqGkXCKhLLE1eJfKzMUzBZZCJXejCop07LZb29MQj3IJFNMabjc_iialIco8CYGnbfA4YlaSy_djZzkypKPmCaO2HnyDdH4rrNGh65prWA0QdMA",
  "priv": "2nnooF569OslD-_JSWfUpKoHdcTACB5PNmKDOFf_3FD9LcxyNCxS-UFDjG0rwKNU5o9jtd1QxKOV0qTKO-bepQ"
}
Figure 46: HPKE-15-KE Private JWK 
{
  "protected": "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",
  "aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc",
  "iv": "u1hQIAYmBXujPWjr",
  "ciphertext": "FC0_4PRrnjaK7MClejTSiOk1TJTLW6hnf81PgSz75p5SY2zlpX_RLohI80Bx58c4Xl7hloVn3miVjRJRoXV6o6EISR_nhApngJZthFiGA5waQS4t8A1RhOanAjxvnB5TByYS8RV-KUhfxidbMVn7QWX-o_kcWcQys1GNh3JxyvfNnMsIE0Ad1CAqJb4mH0l1nPR3BqMWl1U7D_iPQ4lnRAJZz-BV2IYwXX0pC-qVArv8wyeGfcrFGZweFb1TSytN2me2P_WbogdYyyqg99N8QbmKqlv20mDlNXuUDw_t3entF8zdrA-Q06qkYvYA2bIfbaR4AO2jRUNmTP9rxZ-waNC9opZ89uiqNqR7QqoHLlqd",
  "tag": "7_VEqU4IIQtqp45ky_fXjQ",
  "encrypted_key": "jWyjtLfOpdFbtcZ7nVrTTl5cbpjZnHWmd5jB0DsweDYxauI6mgFsCTr78xmNrpVE"
}
Figure 47: HPKE-15-KE Flattened JWE JSON Serialization 
eyJhbGciOiJIUEtFLTE1LUtFIiwia2lkIjoiaFJLYmw2RE1LblhGQnZZUU5NS1k3bVZlbTh5N2JaeUF2ck8taXdhMUtNcyIsImVuYyI6IkEyNTZHQ00iLCJlayI6IjQ3bGM0dHJ5ZXFvQ0FERVJzUlhCLXpPSnJSeGdEb3hPY3pVMTdMXzBYQ2k5eGFCYmlNX2t0VjFSMXp2U0ZJMHllZ2tBRmxvTEpObGQ5a2c3VTY0LXUzRklLSGE2d2otM2c1RGtvd0VVMlBuc0tjLUVSbmxyY09OcjU5NWRQY1YtOEhOdHRValR1ckJGcTVqYVJJT2Fxd2dqYVhtVk5JUFhLaVRTTVk3NEdoQzdlOEQtM3RLRm1TTlk5NmFMOEdPdkFvZlFaVnBjTk9mOHBUR0JZUWVDS202a3ZhdWk3bzNBZnRPSU1LNERVZlZrUlNaa1k0dFRoeDBXVDRWdW5NR0F6SHptT2hpanpHamdHTkFYYjlUUmtCbU1malhDb2NRbWxaYTM4azZrVUlNYmM5M2ZwcmljMnJRQ0ZqV2pySDRrMU5YS1pxa3R6QjBvSUNZV3QzNHdtbWVvaEtlUjBhcmN4cU9Kd01kSHBtQ0pjMkFyeS1JYU85ZmVLcGhZcm4xQlFhUWhwNEtDR2pjajZtLXBVX0ZUcm9fR3FpWmN0bDU2V1ZaNUFWREpOdlhKQXdtajN6c1hEaXdkVXhhcW5wdVkzRVdoRFZXQUZ6eWlmRl9vNVhhaUdQNWdPaWJTOTZ2d2ZjMDI3bXZzVmttN05HMzVBNEhUQ2dTT0k1a1RiNzdmVzFDR0RBeVNDSmhRZGlaRUJ2OU9nd1NVT19OYmZVeTFtZm94Z2FaUTM2a1hMMzFoUjYwVDAxeENxdkh0cU16TU50YXdfZlJUXzYwWVBhN0Z3YUxoYXBhdUk4QXJ4R2xYNVBQVHRWbEhfUTBmdWpoZXpYUTBLcUJOdUFTS1NtZkpJVkZzcFF2d2EzYnFiSUNrSzBRd002RGNlalVybzRtblJZUXVpNl9hREVHYmZWOHBndW1qY2NYb1lHeWdFbW9LbjNVTEN4dlA4S1hhenE2UXdieHNRVnJid0tmYktWTnI0RHQyUWpKOWVnQWVSRnVmV2xJRzlIeFRmTHBsTVotTkxyS3h4alppdUJ2Q2I4elBaTUg2V2FGQ3hsanZDVVNOdmlRWUpfUDQyRWdTRk1mUTFzM09RQjhnZWQ2WV9jUnBZNHJpNmtwMjBnU2hoQjJlaDM4dUFjbXNlNnJXLXVoUzdSRzBuYW85cW5ENzFqeWVWR2JFemxyLUFrSnh5ZFdPMWp4c3B2azVhLTc4TjBVRU1tQm56dGxoMTFmQk9XOC1QR0dsSmdDcS1xVzdJZWd1QnYxRTRYcjJHU25XV0dSbkp3Zk5YVmlzTlRCanFMUXduQ2pwT0tEZVN1d0hGVjFvVzVBd0V4YUlTMDZ6djdRTFdQQktLVy1fNDR6MUVCcXJlbGZ3V1l0YzFTMlZzM1BnYmg3eWRxVkFocG5SbXBMMHkyeVZ3WGNpdVdSOTVBWXJuTkgyWkg1UUd6S3pTVXJBMHJaX1l2cGtjV1E5SnhPSFd4V1phMlloaXpncnkyYmpESGdMWl9VTndpc0ltYmdvSERpdWNnb1JuUFVqdzN2czdZc1BvT054a2gwQkJWT0U0V2xIY21xV1k3am1YbWJzUFhUMURUa0xoQ3NKRXc4VlhManpkRy01dWliR0poSVNXRXduRERwaXd3SXA5Q2VWODJfVWFHeS1Xc1UtaFB4cXo0c2FXSzBid1otdG5lamIyUXQyYlc2MHlyNURzRVU2a3JzTi1oWTBncUNjM3RJQzdTR3hCODVOZmQzTTM2QXZzcHY1bUdpbW44U0NFNWY1cFV0amVQVnEwVzNSTkJ1UFNIYncteEs3bWw4T0V3R0d1dGZtZG01bUcwSWs0bnJ6clBkZmJfWWFwRWpiY2FQQnZKSkdBemd4YlBGQVBOand4WXVWUHZpTmc5XzNFSzk0dUVKQVFEWmNfWjVENEczT2NmV2dVOTdSSGlNIn0.2wODp0VWHq3ca2J6Q45EFBqZrfqAOBwCYXFLufm6yrUjChuVYcO4Exbb3gQXz_Mt.F7mBMsNT50wX5uf8.YHC1UnsMFlklwSuExABvsTSwcYYkshn_0ITK6rdRh_i5vyx2d6N2rdt6MT9lM3rlcrv9pSqL4fSUvy5g6rdQXyfhF5hgrvN-y4rXAIYI8ZgH0glNAXLjQPdvd-6BfGIn_Sxf9mo9otulKtqzgYbjp5Z4s-7PTS13CRRapcOJn0-eEvQDgI4G4K-Dcf5ncoePQ-y4SBv2CmwNYm64229rkmmNZ8VMpy8wJVRflmiuwC9jGiwX0Pwx5-23fuK0VkMJheihsaYcR_HbjMU1TQohcaO-qoUBoDyQXCkExz-B_QTwPQ1uCDt4kf9ZL0uFDSIfH_wlT-QuEw1lgENIa2ZKI15uye9v0gccWP2qE5PWl8l5.bDxCOdD8iYXkFeZRlyYArA
Figure 48: HPKE-15-KE JWE Compact Serialization

A.17. HPKE-16 

{
  "kty": "AKP",
  "alg": "HPKE-16",
  "kid": "I8JfWq07ay30SY_COHidQ2Y62ZTA8jzU5SKaMag8DWs",
  "pub": "3yqOZRgLTWIKtdAVtcfNBKWBGcmi54VqPmqXzDGq0ySjp5FHfHq06up4qug6NuOuqHWPKjaRX6s-_beW_YTLWIVxzKMzZmCMhtwQ_eUDeppbPrwwF3WGR2rMZrmPKutNv3CppZkWtBwKLboJ6ChVW1ivYOExNrrPp_o5hZQ73TNXt3gE99hdbOUbr-cMpIMATfNO1MSIpuqZkft9tllGdgm7lWU3WGwE3oZgn8mAapzFuvQqFgYjhENT30iGgIBAp7xKHMY5FfFUvcWIiwl0VhgPANa_AclvZOdcWnp7EpoT6tQnQBSOD_zPdPxuXgl-mjx94thauWJL2-QQ0zR-9Mu-CnkBNaiJzmOt--enuRRGB8uuMboHs7OsGCV3J4WqDBWoswx0NdqUEdVxQwVss_R8fgfDpZWgtxx180ASX1cnr-oJR3BCFBAaMbFfRFhBfkxr82h5n0lPGkCHAqdE12MLUVqWIfeURahwXmJlfSC-YGDGoChtM0kDazgFyKsdL9pbmpNJOagtj0Ug_LAoXLYoJoC7wRdaDNdgdVZ56Yh5d3simaV9tgd7ndU4ndy5HDt6X_JzIpetaMi-zbAV8YtWGjNhWDEMtZe3S6xbloqtMctV12PKhBy1EhW9mkgt7RBHVvao6wA3OPWIYLODJrtfitLGsLsqmbyHK6E7eeRp9yUsD0hdjRMcdbcsbQK79vA2x0l5F3K7Gui_HCkkNzF_1esEGEaYzmpKQidJriN7PzlG-DsoQpU1hYmQEOPIRCN1lIgiqNKdHMwjPOZ6U7JoMekj4AQFXhgokLKGtZZTrKd_8BdbmiI2rtKIIRagLYhT_MtClix25tItLKYDGhBii3Kf_cUlgFyeA4l5myYnDHqnnIS_ieEybwye_qcPRFRiuxazx9yV2vFTSAN4TZg5MtFGNwEwygvNwwVKISequKRVmttw_IgvfmQRmDerg8wqRVy3rxVPDzW8oauiM8QdnFtFTUtwlJOyqKCMQjU7JZhjPikItbtwIPlMLhCcifXNE9OmrNVO1VlSRvwVBIc6NIMuw2AqVNSTYHQCvFF3uvh9p6uJywmfg1icXsUgABJvlpuqKHAXWVJ6kFYBTzqnHSoChNdA0wa8TLkYxcckG4FCL4iUShsa-2VJf6lu7pJqjPudaZprdKiwD0Mj7mym2fStHRmE2qoefiwGMNocFgKVe0s_KyfOe8ZmR5iUzpiAfeYL5dE9GxsutJiMUYqHmCJ71rkHKZodDcUJlEMoTDhDMMPIBkqTjRxDfvqnm-w4yBUEQdCz9ykLyhYT2fMn06pT27Wc8uEFkHMULHRTdWFL6ZSVD7WX2QJh16UIq7e2R1bCsvxQTRc004KKV-uSnUEkt0NbqUh6rHUzVLUeDGJf4uyd0-XBXAM87exSY7V4bCp1uyiq7IQujMym85A9EuBX82e31VBnHlhD0zREy-yx0sIrKIC-SjyLaLt9AgoXVUhW8PwOnrtPcLZ1Btsv5YKNOtTJWuNXKizORXvIWaielZyeoHBBEpFylyY-GlRodQe0N_gKdLV5MVNuFapg2JTHmcIcrwi3CJaRiptBDtxJnOS1WPwxtvsJQkWPhWaqzkYqApjGh6m_8DIXV5xTabp0ojwAuBa9RizHAck2QqEoQZu9F0d6cHSJpCV-o9QoskaLyIp2PXJdUGJ6s5E6R3Wncaecf5xkZta_TEUd-TZkiOx1cmsWFilxhQiN73RHehh97zVJYoS3Whh4gbiOWMKoNRiv9euVkrcAe_dyEnTO2GBM7uKZR_U3JgbPQdId1-uxHJMr7GgmKUpoi6gRHxKp5JoRwydxcYptjEdF2rJwGBVZqSdPfJgXpmEWAUxaIqUOAIbENVUgz1BpQJgCoarBVEAc0YEhaoQ5H1wofdB5dygpS3KNY9Uon7p1zHJnZdYUvdEb8neJatgS-Rq0UgiqJvIiLUAK0OEE4TW_TFI88IG37egFunjEncMX15XD7srFd_YdwOACeZBHZnkC8wKuufZuEGW8feaEcIlPWORVEYACtylZX7kucwK2_zgUxdgODy8Oql5w0uHct6Y_sCGPSfFfBuczO8rYGuM",
  "priv": "iTLE-qXqN8gkBsHca_rct0437-53kn3BwSBz2VOdDppbXeq5Ru50zy6vQLYUgkdSB8Q7A64dyz57967mHyN7cw"
}
Figure 49: HPKE-16 Private JWK 
{
  "protected": "eyJhbGciOiJIUEtFLTE2Iiwia2lkIjoiSThKZldxMDdheTMwU1lfQ09IaWRRMlk2MlpUQThqelU1U0thTWFnOERXcyJ9",
  "aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc",
  "encrypted_key": "9SCtl8C5imfrsH0XGTPLe7HyGO4aUlGdcFs4xK17YCiTQ0aC7q0dC_FLTdsKzUO5UiHmc_wJw6DiMNwSuZeA5gn7yGTqidirlBHeDLNnePeq4nS5ER7lYAzP53cobsaWZZ3Cgy5j31xLleK-xypnt2OBAmxIaGquEsfVYaH2fQNQp8EYLLPdRgQyY6DEnWwksr0PsvkgjHY8CquUGiQ_IcbOVF6mUa445Ax1Jp400fDKeyC77v22RZyWQ0jqtWH7oIGhkc67IAXi1GhzKaBZG7_K-NeTU0J_r0yfFRuU1MDaTHFWOBFG06qHBpZcuO7o_gY3gthAl8ghmKlvEDU9W0mymY4PgQxZGBqnUKGq2qpG3j7gtvHRqZ3sExHDVRi2X19XSQYV-0-q5Rt5Xo9i71bDa8R0T179iGEDJgaStuJJOUbdR0Ww7loZpnhpwlyo-DQE0lx64m1VFpjLzwfpX3BU7iBluEBcxzdlNNPOKaIb82gjvYmv8Qd7GpDq_P4nEtNJXP08NcMt9DL8LZFQTlH_MripmQ2phdZPWqsNDzqnucTSGwjAq0WNtHREYWZe7rrC4d4pkLvpA5MwKJD42m6UxPRxIMae6Xw5kMNwQfhI0VyA3aE5WjtA27kQTb64RbGaPyrkTW-n_yMaTZe-qTjwUBsD9zMknO0hiVv8L-MkPBnKjg2BKRJC2RQFfH3cP1DXywmuHJ3wHbRQxg1EVk_pWTn78H-iSQsO0BXwLtA-AlcNJwHImXwALd6fmkvB-omxtlPJ8zj0YZD9Hnv4Ekz1Y97lwQ8OVBVycWoz3-kACbeJ2tQEwGkh3KbczltAvz9_O01znIidUNcKHNO9v0E7Ji2EWP7n2ZoRvR04tb2Cz_dGqdSMawFNccKWDa4h4Pqzj4XsUiJTZPWuUTtP5jkMwSLqCpa8WueQy8fqhyLAWzMcJ0UUNRWS9HkdIJbJl0gIQAxjaLC4TWVXxooyxZn0a9JJqpZudrye71zcZ4cC3YlqsuTRwDRpvHKZSkKQCEZLvwWyBdUtSumtfAyiXFrejFt09aekFgzwYU_B2P0mFwyvzuDambtuedlp9LvqsR9gYnJjff32eXfh_Uqjt6GXJnqEjTDmAm3xfXLilbPPDXF6hTocTtbV1sadDAoBm8KsRUG_4XDTzum8AB7KbBeqqMPVHPIU5VMIvodw-wRWsA1GM8Ibs0zQkeNrsJnchQ8DcvLnvREg5sJZ5HgYsGeHxcBPjio9UJsJ-RTTu6km_ZkgR7HBzO0Wnfs_rxFAMFsDuRlRoCZM2b-8XnVpQlj7PaH6dj8L230BppDeByaQhKUicm1Cum1Lxh2K8KkgGXeiZc0TacAqgpJUyKFxc0x9EM53-jPiDbW0Fx-lb3OMUZKFBlefiOwec-6bLTD-MngJmAuleupgZ6rnut6iKNildvX1W1qkmIpL2av4aoPsxucINkkoet9Ljh9qWKMdeuHy-0NS9CQQnqbX4aRxlXL-k3KXiCLOe__ebyEICDtDrft8X4pQBJS3eiya31C7NJdNkkJdUvtxdibr4dkbvgrN7evniHw80QcUoRfK0J1h81rPW8aRlwB00LdcroJWdL768JbY-X78kqO0nWsd1dBMHxyNUGHJSGgCl4tRp64fcg-Ke6P_SqSgbUHoxNXG5S4Sd6cRH4KXTa2rwWgz29hZm6QlN3cbfUgApnromN8s5bgMGIV3z0hpQWwvwuM5lKu0gzSRugTSCGeubXek4mBxSt3QlJwFYq7i0camhDDWsGCieFrfuoHN5LJUZPSIQfdanrJwYggfPoxxqLeoqsSibQwhT4Fesi-GEEQWwrgTZUJCCJIoxRF1CVha_nfKFPyRLX5cyy6XwlIB63bN-StKD4Y3fMEozJuxJf77wGSShFyBVKnIF9nXV6N2qzsOOQnq9hLaWj4W2ZD9DAea3qFEFDMjdaBSHSNgiDTobQiwOmJXKzbU11X7e0FgEGouXWhG2IJpfumciZgUvl5Q5YyD0p06UZPdt-ngD2ZFRBDT5T44O9sqbtKAYF-APNu8ylDbFSSxvZuSVrNOwtfQFcH_3ZBxjr7o-IDxcP9XZDM",
  "ciphertext": "t0aZYvdQaiE5S_cps8Gy3putNe9CmV11-x8JhkwXs7b6FVBdWW9hJPvDUy7n-o3nQ57Gb2f9_Pt9Ji_3LAecuTBzGb2TS-xdzvI1RzwxPPtMIULD1ZddshdYFmwX31CJcTrOdYgU47D9pt1uhaYQwn_ILG_gWZ_XrPYwZFKQE-jDidOUfb9SHZMyk8jeEZ-wFMYIjA2B61iIqhHOCsh5aOYPb-H4M_87ETVQy3G4_FSFaY6UgdP76R1wPwiZqJ1wraQ8dX-YRy3b-hF0PFbbySlCQN_xvCGrq22xYiFO-aaZlgdGNZF15O6oB5AseNHN2kUizZTYKhNGX6B1p7fREjYBc1VwP0wHBfZTW4YdKFzQvXwOznEe6o2TY7cGc8u2aQ"
}
Figure 50: HPKE-16 Flattened JWE JSON Serialization 
eyJhbGciOiJIUEtFLTE2Iiwia2lkIjoiSThKZldxMDdheTMwU1lfQ09IaWRRMlk2MlpUQThqelU1U0thTWFnOERXcyJ9.vgIJFWxQP5T1it2PGqYOPIk2HUVbPiiaIavXkVv16G-HY8zDIFynWiyae9H1Z0dlKGGUus3JnI5jxL8nzctgxWt_YtpwOpuIDaudMocLEcuJJ7Y9oUV1DcXTPQH5z4k2VfD0SIrws2M8qiDiTaL2JoFAEDRPkH2pbA57pLDYLv6uoWtfdohKJ3coq5_9zz5ZIuzMc2owIOBMuVr-xQSZubrFlGiZ__fbaG-5i3R-HuaNC6yFROPAcMZ7X_wnvA5hpjMct9QVSzcTl7gM_xXYs4BWlw0j-1wT7-kBAHUpWZ3ntfHxKmGqqd9ThZZddHKgeVl1E7OpCeF-ZEEGZS-x5_RS_6lS6p-1Lb43dTc-YzZIVUvECTTBqlUB9MayY8vUhQjedus5BhQmS6xld7N3mlZ3t1ONxsETcj6rG6cDkKCZ-bGD4-ay0jYb_SaTL3vVtnovxuoEWTR6KKcOSzXqHyaExcxYseKbAhKYOEVnj8IMmh7eIZ6p1oOd9LFI_CS3zo3kjS4NG2kVhF0KfoAaYcK4IXsWa67WNNGfRrV3mNFUMtUDXKSBs8qdo8kEjC397saxKFSCfw-I8uaKRhzb85xJNgDtpYbmCBlMKiOQATX1qutAQw4utpEIHusyySvXhakjbmYUE1HNhMsd7cOJojKr_rFOYSWBCumbosOsPmMrNwJNSfsgvj4ucnkmBHKa3nBAOY_SjwTOaJlKsMYvKq6JO8kuGBFxX9MuBrBEIpaeOxB_KUsJL24fx6vL4oISr2QA2RxL4r9nc1kqLTKneCq_aq6D1Mg_mH2_qnRn7UZLLJjGYe4xgo3QPUiCyh4DQEyxG8zUrpLJ3fx7a-4p1rhNC9FKnJwc3RUwL7jaSJIdHtC9Tv3UHg_S4dzPijiRBFqLzi2Wjt05zjs2ySa8egehsoS8-sYUjZKVWsi4wFFlkAnQcrkMoSNxhgGufZGmLbatQy6oN-sNTzLr6jfJnD9tsAB4oBpTR1lNMadXth8dvYKk2z702I6BfzAEKl98DDo2f3fL3vv_WPOeswXQyY0KAzTlnIxsGxzDnBlea6NRAFOMp6o9XpCA95rcvVjf9ODAO_S0q22mOeMaz7Vu9G7KRFui8YXUO-KjmM6128p7RQSf_fX4DggOvSF3FTsaIcZ-8ggMDjpAT5aRyGOki5rIxAWH_YhVks6SIymUj0MUYh_GfWCS9SJsLDjMKfdHbabTM20HvTQr6JYHifzVzsnzMGwN7NU5Mx8z9QTJ-8_RBFiOpDEj7X3EcsePiGI5YKCf6KuAmT2JzRiNq_-gXc4igMbv7PR9ezQ1foHOJTsJl0qBS-EpHu1_Sv9FkBrqXiAVsDMSPZhFQjBN0WafejQ-UBAEMZx_C1dZmeVf76GWZCTBczhGGv6s5hpaKOh_IY_yI-72C3Wum7sG0ruXPa_NbSjUizeNUJ_kKhJCmObWaxdXlvWwu6epT070WaHYGCkem0PoV5mH3K9ManF1VWnsrcl2m87SydlpiR2Oh-ZA4W6jI7co-3GNsdGbVhtNA5mD_IP8eVgN2zdNKhdzkFb06Vsi8hBWOgAmIFw8KP5UY7DZH4iiWDaXvUnCQC8yub2iuidbAOJQJodIMq1wKAgGGPhwaj2JA1dw7T4G2by2A5QcwBTvSee4ikgGFXhfsErgREpLg5ojpUwn15CQrz0VFFua_VW4oqZf4RmcBVu4-xidWf0s08NdCPWnsHMeAbfgovM_4ro_xekFtuMs3eayKEffo2rLLwyCI0WjKk1NQiYcPUtqX10JeQlRWVlRDnAWKaA2Q2fEN8OMj-XhSkgqwCsh7lUx-TT2doEt-ZJVJ4uja3d5wmRl8mGqCsjtscitqCA04cxzHEMkLitDXl0xE_2p5n-zyE36GkoCHHxFNq8zDozy3PTpgCyZ2Bl2yuIpw1dYNNmY6Q5pC2ORCFQMonzvEMwRJ2AGlZVl4fIgpE79xEw6Irb0VBNZyUGkxL0KwejiD9VTDXdqG4ILF7x3_ctfNis4IYfEcm3DCygzJ6kX8-sLdyOQk7-JXdIOXV_dJnDdcM_Q-I3ouewvn4hd-mWCU44MDmTqPNvr6Tw.._PneAnhrXaXywIX1_ueYhGnmTtLkHnPOjD3Q2-Cxcx3XUtyAEiN4kZunwUVrppRqWq7xd3KkGmjXZCP6SP37fPlnPnHZhBUMdf2G0XnPcnyA3nCfSrjYWmg3klImuQPt3uWIiFxwRp9gW6bp-VPbyuYbK8atf3aGm-PxgL71RMAiUkW3oLASPEAnzTnv1VLEgoWp6Ujld2EOChzwNZz1OnuCDT6Eyr7toQ37xLE9Sy625du7V-xUMvIhXSqWVXlxkxMfc0UMc_Nhc2zZ2n6m3VCP-EMQV6bPBN8QKT5_u9lVW0fTaWxXgAfqv2nbuXitBl8VwWgxrJJdh64kV6R2x9YQBj3VjV-5AUGEBWB44dGMXEfEBW_GwRdaMvysEQ-Vdg.
Figure 51: HPKE-16 JWE Compact Serialization

A.18. HPKE-16-KE 

{
  "kty": "AKP",
  "alg": "HPKE-16-KE",
  "kid": "fp7xFR02KVoSNoplFuqmztr0Y1SeZdEHrDKyP3-PpMg",
  "pub": "b9qWvEdkGIscWrHN18uSxDXG3wC1XJJJzEodohGvzUErjph_5DmT3Btf1xyixux4M8lImQeCO8V6IXjELxajS0Zcnxew-SqL6RO_c6NJFVUjGNJgipofRpRmoTm0mAV93rF10AJ3dSfPeORGoSqAYiGujdkdSLqfHnlsu2yAiFUbhZV2O8xHGSR1XIeIg6miIoOuJwzDF0UGbKsrAQS2JIdEYfF7LVVgsDB8teOOe5p0fMCLhihi3naM_UUKmyuahiNspuWP9ehQ4EZfrqicGSYfuRLGuLiuipNaSwROZjMw8nUc3jJlKVUukfQeVWQKdJi7ZnXMDadysIFarrBJyhKzqelv_tsVtICA9nIbjrGGoSlYSYadrLaUW6sU7AqdbxUQeqMiTpFY8_OAoWrKXPR-p9BkVptOBINeCfRZnZvEE8sBRLIyt8cuOdAig2iWb5F3Y0cxxTdX4gFOzphtQZBRF6yWv3RhQsWwm-m2u4ojRJS2PrYhm4eyGUEH45h-8rMaq-mqqhnFeYC9bAdn0Ul55Uc7wPUf7jA7L6RLuqLMA3ucRGvOKfEwQLi6pNNdfFDBRPs6XAxgebyfzAMWVLmgePSnALu2cTB_pViu_CEI3nGKuYMoXayWF5bCtbo8cQvEjsK7mnqTUmctpdtJDMdldPWApCq-SwUl99eshnRr8Dx3zgEAR9jAAVwtcRFeT6oFoMQqL_MwaECvcSyws6qogbBywFWw6GiqerAQAfBU28COb4u0eSpWBRayMduhziZbyhNF6WOwIohaJFAe8rt1VIkBQgxeZNKxIwI54-FZn1A6fKVzgzGFR9V-fUpOO4lpUzoHv5kRhjUM_VimWceAb-lzsPHK49QXFTWCQ1ELGrR5mAi21tFtC7EE4_Yh3tovTggj7AYPQBnObWqHv6k5ssCNqfuWObGATLuaE1tOx3ZP_MW0k5EPAEKiFLINZCoKDfo8ulAZF2F88eNUSjUTWke627CG_hXCmEAu5uSaSmtHvpjG0RsDmPBojVFWSod90bJQObmgwPvAZ6cxTQRekyxPAsLPwBetqqc3I8IDZUuTcMdmhtkIfXxZNFiXOPc-twB_NwAHiou4MDqZYatV_0QEqatNIwuoxemKf5QG4FCurEo_H8W0O3cKe6gNgnpTcGgknmMDmnVq46cHvcGdxIjOh-eX1TQL1QS7XYd7xykxw0Mc_TVJoysn7CR04FKkDWwRFQVSzGGApSK1fEN3LaxC4cUBilkLSmWJEIjOE-eJFAA62WE911uSFmQeVIe88mx5C1ONdBrHOQLI6JsoNcFG0Hke1Sk3dvA3yTEEYlOg0saF3URvpsJUc9gy21EEugOxAScsfbEVf3oqlZmAopGNBCQzn5KrEgKvZyVZj3ZM7CcSTeugWPcp0hI27NYDHnUSUjdPLolJzOinIHykY0WoQ1Etx6pnBDfAo8FcBXEafIOZFxAg9hFopolShGGz1GBBzjin5BirX1Ielqd7R4FRtAbBJgAhNsukEAYuWYhI9JUPVymSISm6MZcHuWp8JKU0Q2dS2FImjEeMm9VMIEdQtwlPZ3i3JdAgGQNfa0o1JWEzcQNcerApY_c4SxnGQ9V6L_gJ6SmA9atK42WRREIURWFTA3xn9zVS0-gY72h-V2W0gGchCHBQLCBf3roWp0W-SDRRZ3wCKdargnh9hNwQO7MNJvVYYEuQodzKF9d0I_MOKsjCEagi7VkOrGzFL-ypoeeMqRyWEksYTNKLCMfDCtet_JMkp4ZYECme7aslDyh_V2uQaMUmK5u838Wj6fJHZCZR-ENOrsEKSxFNLpke5OosRwBA01ZZFrclaqmPVVw9fqc49wZQ-3ZaSNlKm5bL09slXlSZnFd_NnFzyRyekNq-CrZ40EJt-TCoqQJmEZKu95MlW0hM7JQUQDGOD1dvQAUrE9TCGSoy6hmaPcvAgDOTVTY-hRoQt3lY64LIe2PCkGphKkSp4AJvMBa-lZSh-bkx6MPDI7ZqgbOeIBGtskackyhxs8O6ORNd48Noj2SlzqcnMeNUdVVwSd1GgHF7XsoI9B75mib4ohphIg-NndvckxCNEUtZbgQ",
  "priv": "HtyU6HdQnRWu6bsyxJOsXsKf8VzkEpioQY-G3nOQF4cmGn30-0l8ig7fSTc2ZQqC-lI6Hib4uxXHHwO8chLdFA"
}
Figure 52: HPKE-16-KE Private JWK 
{
  "protected": "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",
  "aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc",
  "iv": "jGzcw7nTSxcmnbtf",
  "ciphertext": "3YHbZCBPMVQRvr39aLYdHQ4xb2EeuV_Ko-d2X5AmIjt9Bi8RhK_RYB63q_D0YCOTTuIfgbKAWrdh5Fi3UwCpvVk3ZadNVjYEKmqWmu7WU_7hYX__hBHdxMi3BHc10grMgBo7T_BHBFz_RGRBmdtx4-X7uX_WFalLK1olr4tuxQUC5j8JAOQIsmHvNbNVQX1QzSii2TSpMB2KO6e9-wKMIcwgtsUUKWGC00BAnkAjpNtQP477uabz3gYaSwtbMd8-AyvsR9-7yaz-uRODBXDr4_xlHZWDgjbeqwApRurEPvGgaKJIV96bWpNVWIU4WzvDEolRkgcdE4u26N328Wp9OnyGRVgoAY14W7uvfk5JaNCu",
  "tag": "mTh7DfqlSHP5sGt4ZnYOgQ",
  "encrypted_key": "TuOhaiJVyK3Pjic_XPNJivjJS42eCyo2pz4HVNUIb-SSPCYEffEAf0F8LEOhpWHP"
}
Figure 53: HPKE-16-KE Flattened JWE JSON Serialization 
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.xzRGj4HEx_bxAF7v4Gywoj4IoZytz25KNiSkQiNtzDCx1kL6V81cntf0JoPKU6ZA.l9JgcEwO0nPYNM-1.5ZPwol7KmPIJ1ZOR_KtuXm7pH-Qio1K1fTR0AUrWSeMtCv2LWHZ1FDiq7MnbLC6pxp-JZ_2CNaHvLLCdSMaQi0td9Vg3GLYLwI6stuGzURSBAoIjS8gdTOrB13aAoVJ9p7OVJ93xPP_Z_Y1VD8yrHrvOkF35cXv9MHWEGs_1b3ziHS2yqtKfOZ5uZnyNBynTpziIIXCIcWAU1atU4akiDAqFCWEOyzaHAAq7GGSm8gWltegbbXy_LtRaNGbRsbqNY4mlnsYVqHoc84izoEh9Sehb5kmUuoqvCEkkHntuk4w6ubHLliNsa4cYFMMBZ-YbSYmqFjHe6Rf7e5E3owTKKC1SRsltykQsK0UmyQcZIu0l.c-OQ2YJ2VYxpFkEebkIbiQ
Figure 54: HPKE-16-KE JWE Compact Serialization

A.19. HPKE-17 

{
  "kty": "AKP",
  "alg": "HPKE-17",
  "kid": "QWZdkjasH-qrIlYW1fIk0iqfSMJQBhY4-FbbeIMVErY",
  "pub": "LTEwJhh9rvh6Qal4SbKkTHws7-RJvpEc8hBzO4BYl2KgEHCEd1LC62EvAAIMhQnJSil24tEh0IMD-JeyDiZ3ugUZ8dmM7Sc-zDc-StiEEiDBdLwNa3JUPjETBvkMcXk9rTjM-Xanl4QdY4oaHzPMv1c7g5eojHiXmWqj4MS-N1Sus7dmVkIsS2TIMsxIpiZWMAOzSmULK1FB6IRplXEyrKBKCshj-yBz45Ku7cwkQXnIZ2NHnjdh7jJfNdqhKgp8GcMej9s0y8MWCWt7phUIZKO3jZh1mvQ1GEqGRgBkQRINISxmlqA2UlyQZkE2w8dxCzzO7Sp3W4dvP5kpCPpDn4V6GphogiPMwogzfESSAGKjWsEIn7I6ECm39cAlMch1ccFB5-XF1ajFnYGVdOeopeUsW6J1yPhkuycXUZlExadrfcyM5Dg3xeKgmuy0w1yiuqXIRauaZ0oiSNoxQ7UfeRWY_aK4ujm2dDG1W5ce81qKZfyqD8HB4LqLUTebMQCCMkZyCgRRK-Mc7FmaRqFx01SIYwg4cvevjzeU2FyvfCqVGHy2lbRzFjdGDet0s-NgAgcsdfI8CUV4XZixA3B-xFaTBHq8OKpaNuFEsyu6fhQUfXxY7Peu4YxPsxKdQwqTJkVn0vYZGTABGyQ-uyWH3qKIqXkPLhMNBHs9DPESRDAcNcNbNgXK7HIFt7mvVzIB-1BGhPRiJDKosalBmRVoVUEq7JQ6AsQRmnRbgHouI_WTIyR8cCaqJWdpjvEOZghynYYL37ohT1cZlnFaRop_GppK-1k0gGqF7vJ_niKy8hhud5WA1LcjzXVE6vCWfunKv8IxjyUWzLsWBqaPmSaeEWUlWvcbJlZTjekMiDwtmqQdgoI33vwslieT__EhbDeEBERTGfJqO2ZP7luPQDTOVegmTVnAWpwWUOGY8VVdbGqADye-Ubt5oaWse3tThpXPXKeOpDNEvHzLy7KF0iIlNEQjYQrN_cQb0tKOMdWeVHqkmqsqNah9lfJXonQSqkerSgV2u0B639yew7gJ4-h2ZFg9WDcTO6Kx46GaA9Mr0MtuUawqqOLBiaW724qTKZiuJTUzkBZ7NKcgdbRy_SwEbbFvA6tbg7KNtaJIJUBZnLySnfSbB6R5lAdTLSlBx_HKUAE6Tcim6_tUJEmGNOyHOfTMFqHCUOoop1Zl7dlbkGVGdLY2eckVqBO6a_k9Scqa3IAQkNBYRlgsBKSKjWSkitF72FadR2wsnZIpbMqY-OWutZgKg7RrfTaMGioYrEuEcRRiCXEHhUBTpaQsWtISmnWF_sZkMkOkKTK_L9MUSmWqnxo5yLt5nWshAQWuVsU7QcIFP6oNnok5ObUL1AithOTFk1mBIKBgMelk58ptXydifTkgTfyeKFl7ffcpf7EpAbgl7gMVPVKAH6iFZNgs5OyDSyUJ-IUjgQSVPxpNr9S82WOAonh8UlBVGtiNUKca3Zx9SbpvDppsTQVdPhox5CUcv0hjF9mqr7qV6AUODCJpmGWJ4QpexiOOyZZ8MRetOSOdpVxviDotR7cTC4W8osYHvEbDo1V-axClLFaA8IBJK7N73tVcj8yoPBCuTGo-6-bAxLgZpRpOhNqDiAeUKoy-8FuCLdd8C8B9Fct-u7A6GbgWw9RwpqFES2BnqQzA-AtYBuF9HChrdOCHs6EmbwE0F0dGmQHGI4aVv4OPBJNjF3EO5LQ8UbQTj-Rt3fEhZ2MlMRVUxvQ_tDfNIwmtXPzIbhI4Q9QX0JVL46YN8pmV7Fw-ChdgEjxFywrB7JpzavacoLEHvtejHlFKLXnGtdLM7yrOBPHECBujbqdvIHfJNauyz2NVvoG7w7nEIZseKrEdPbanEMsGr7QA3mcPDxlMyORSSpsvP4QgUGWuy-JwrISjjyMHuLJJrXTI42fG-6uIQSAugHWOJmMQaXpNPWZDa7RtIThcigaWLhnO9NeX-iYEceKTGnlULLO8nLelaGeTnthdbcw6JhtpteLDMfZFEPs_-6p4NKY8BGi7k8ICggtrk9ywo-qo2jPLSHFtkJdYuqHz5Gdm3331wMfI-spQk4JNFy1der3YZkwP8TU",
  "priv": "I1v-IPJPcDMw2xO4rcknLwMM89dk7Yto68XITmRf7YCQ5R99pM_cm0NLKf_zSzrd55rQEKk5KED1Mv3NBtxkJw"
}
Figure 55: HPKE-17 Private JWK 
{
  "protected": "eyJhbGciOiJIUEtFLTE3Iiwia2lkIjoiUVdaZGtqYXNILXFySWxZVzFmSWswaXFmU01KUUJoWTQtRmJiZUlNVkVyWSJ9",
  "aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc",
  "encrypted_key": "jySECvTTwfiXW2mYkfNqqe9IlvNYzSSeiZ5CgXV7Zt5pFDGjdiDFDQ09IeaUnDtfCMx51sK58dwNv3cFCp9dBi-kdAynCutCnd90LS6aYBtvxqwdWMmsfTFQGheJDnrVYBqdE5K6zN2fxo8BYXeD-np61KxQPqhPyoOGEJ7Vt2QCAlFoIzPnBAW5bsUfUX1fmp30Kv61KWfS7Z9oIs48WnGqZbcxzVicwmV9rgFwOQHbEBgVyIMZdLKIpjxWDkd08x6lxn_ay2yXvEQ0Qc_jePb9aw6QQ4K8MrzK1IxphPrLvz_xYAi-UwZezAEViOLtNha8BeqvjUcpYprXsHaIals2SrOvo_H9i2K817hrYTDkuEp0YHMCYDY-dKKvyBeyYbb9XXxCtARYUEqWU7kw0i-6oTesuV8zC4g4Eu_S3xj39F4jrf0n7W7VWilVJWXp-4ibVyRA8mmwerbLte4wafceKh8KwS05m0oWRnQB4qlIXiHFOQfD3wOGK0qKEPiBJC9qXyPpFXnabBjLWtBazvWJd2bapZljKYMMk3yiQhFH_DmS2dD8X_Nb9Qta_v2MA392GUUyFBF8P8_8-hUauzc8HhiTv_vtqLg2nDiMP1icRHqM5NtrJSsmeVhHt-Y1V4BHAolEsu0RSiarFR6Lz_vBAmeJ4bpfJ_8k2c8Aj-yc2Yn9ZTQuFNXl1tTRIjJjuDcBfdna4doMcJU5qqxpDy2SfByB0DoUiIV1o5LvdnnDpWHxxcn0a2G0B8vz3khwc28-bnzJpP1oZx-EGYNMYEd99RPj6iJx92S3SjpTdx3Q3JLaMppXHE1PzOOTI_3nQqW9tdmxSLj1zDgwxh4IpsK0N695vODOixnAjlg5P7n76G2dDCRGn-ylvwodhhpvrUjs5EwTmkzdDXk4f21E86PCVTVEFz-Oi4ifVrYLLyRcBHm5b-TrOLunQooiQN9w6OPifNKWm1NIiEJcRJWA5fCopFA7YNQVy-FqXIAMMBfGvVttqAyK_yEpHQlu5w8tsbcBTsgXsY2ve1Ah5aLpAylu5lliXbtGK_3b-hxjy-QiF-n3WfnJUdSyTv7icdngBFZ9HkWvzgmISfkPSyIAn2Jl9iGlA0ud8PALoBjRQcO7Q9rc9ppOAhhzn7hxFmCFuACEu07Wrog-wbZNko_23uf8DymkT5LDaYmmvjTeN_0sPzjzf41iRBL1PdMaVQsBZAR3cXAQ1hpuGiymt9BgRIr1gQeItRQ64Fhy6OnIk3WDYQiDjKWKNuc6gk36iVQ28upKg2ExMwSM3eSY1bjzhglZaMitRDWGuXuwROyNW2WZORO6b0bZvDpWaCaQ4d3RFvpq5cdfUf8XiPGfn4RIIZcxkTrrQZIbX8iCGVlflzmXKYMmAFQiRkHll85Axv0ZieXwj_SX9ZsT-TCqad59iqMR4j6pjME2WWSgaJk6WrMwKR7dQNq_t7Fl9MewHKdYnlPlQx18KbvCP0vNTJzRqhyEoERuUkInhgWF0HeTXXy9mkLZ9Yp7td6jLLOwEvKL9r1Bi4Y2ta4_VFOHoE5MpgAoA-z9twNPbh7F53glT1QR1vDFBubzF66vipUZW1qDrdqXpvvxNP9w2YdGzOUPUpTO4LxkEz1rxoeqmU-7rDUhmltuMYvxly6ppAIpTTXTbvfPGxMB2AtHzqRBaBFCoTWMjGfaVVQt98w0vaFUfm1gyGPOcH4Dh2iMgS_98lGUDmmuFWP7m-fFEsjH79k4eWTvto71qLBjZLemgB4A1lbOu6ut2jcSaVcNv8I1stNJCEX5zwGKrPDiE6LGRWvG2PT27OL8VpBk7n1vhp1TJPbM7OhDoP5lSELpGiiIXN6ox4n0lHPP88_SBupev-fmLEe1e5-o1X94nd4jRz1o_f4pjN0iIHOcF1MhOrYPlFfdOMBD7bPtVTU7M2YrXc1_Gq98CTsJpdmh9ELUvf-V71dZodiMmj9H8CrbRfH7pBDgsZ3J65hgvlTSJYKhpVnT8yh2qgqfyd25YIwo1xRTDITK_Wd99jnkFrdepJoSsGfsMcl8HdJ0RLh3GxUsaHeIVb-a_7evRkOA6FTju0aCHU4",
  "ciphertext": "NpGyuCe7oy8GbDqnKCHFJ7iN8ABTE9BEILnTKt9jVVomuxSGq-VVuym7sso_bL_KPbLlnm6YcrfBr087oNAX47zvooXJHjt6Gafwpj8qcTHOxXv0iisMYqFL0CbnWmCp92KYu76J_4EUbpcnNhW-RxllZrycMmbNM6Cjjirn3nbwDFE50hV_Xho4N7GBuUxl_cOL_PJYebtQz4cz6j4FeZkaeeZXkqQs3v1LCbETcfwKWsQEIpKd6sBSKEimV-eeLmyqaSRFt8Kgh9y7FibUX_BvYXIK-z5FSnUpg8EL94QHuEvjt0WxhzObaN5W49pNQ71JKlkCeI0bXbeMkroDWUw6X8t94IEkV9Ac9LHmOf2T3SL2YYed1BMgHMObvpWDzg"
}
Figure 56: HPKE-17 Flattened JWE JSON Serialization 
eyJhbGciOiJIUEtFLTE3Iiwia2lkIjoiUVdaZGtqYXNILXFySWxZVzFmSWswaXFmU01KUUJoWTQtRmJiZUlNVkVyWSJ9.3iLs6N4egds_CZl-d-0Mt76d0ErYtpSV0Qu8HTPQLvmyoU1yyyF5M55bv2RzuFueVdLENXcHqwAsEVofAH-U8LlujEKijzd9NObtDFlkUl5P97WyoyMMSQ0CXom-frHR0xve1hijlA1Vtdwgs9uQyzZvH1tUih3KmNpkM0QlcT8xQpD3Ro5wLzNTDVwFkjf3Sv2aZpg0mj7DnHUBYqML1B4IlbjyVmGRbPMMH1ZL-uV5pLNvS2WBbQIIwD0-vRLSWak3Qdam-dCRXuCqIEp6E4VlURlvvteQIMmxTSMS3BGuLwwFkIgtavEYR9JbO9Fhny-im4LPiuaAiqHK5upGzKZ9IeRg7Biqzl4hgAIwGDQiZBJdAQ0-sEQYn0oH6D1hmMPExVgC3EDQlbvrtTjbZUD1ycWlUtYaigHn-zrY0_ovfTFBR3_1RFw4MhvtII259t3MVCoirMhmCBnbQuiCutbU3DonOlb3SRP7p4h8s8JeKugeLrSPYG_ynikcClgESl_oYu26sC-um0j5vm1Ltr5bY2wUE1RAZgEIy345bhaXabxlPo5s1KviPge1thsy7Os2cAcaeqyjPvSmyBpuNHpp4PtgOurA1DYKVKOIc6VoOuLzUeVfnr5VEt8_0uAJbRHgIM7-lCvN5yzhGj2TMhFtxcgfmYzsk7C-jPbJ0JwOWEYAUcwesqLVg89kRkBWz30ATy8uQ8NPqz7MhR6Tkj6VPu2YPk6Y-RKtBvuuSNXeVOUfo-oelFlnOA2POoDnz_0Zr2OA06HYOzhMc7yaSt2zNh7icYIeZ6qG_97G9oObocl06PTDDX8iEsLcIJPDInXP3UZWMpT_mzqvlpy6sC5rko87pX2e6FqAViTnxlbIaEM35Dxb2LiKR2zmQTGw6bYlKtTurEJWku-H59n9aFM2EVp1jIH4AbsGHJdpi6LeK3P4RIQ3yhaNSzgdc7JSqKpnf8QAZYtIPJy2xLfzZ3YVqUrcYdlQpj6Ez2SOsvaa_pqM5sMbwpx5YcgD3kAIpVAu3ZlDz4EoZdCW8WJuzhWmQPLRrRR-MMiIKjwqJtY-s43YGrPgru6MmOb1aSE2OiJh5RyF9PIEagMsWhfMMtGbfMaTLCPMu_EITMbdwW1qcP3Wi0bimOQb2gbbUWYxdKKNeYhPZgBOxW1ng-adQ9KbxsQuXcH-mObn74D_CI5QO1icAFcM6W-nJJZ1lq9ldD9VrO78AVrDR3oysIattMiSR-ywp4swJQ2pSSOr6EclxksVycr5tmAjH0gct_zCb97pebZzi2dD8Sd5t6gkUi_qEi_FnQPwqj7kcaC2VyI4oIWsgGO_oI-iqyAHlA-ERXUB3vcrR1IhJ70Vv3Bz6OuNyDFWkH3FGr9WuIzr-_l4FPq1KZXZsUAeX6mKvVaKNraeGgkYlWv4e-I7Q3Fuuj6M2iX9KORpJVjC9FOnMuVRZkWVLacBoS-Z-t1MsHNYURWWYPj-4ZvrdJKnIJSG3LlV-taCcw4IKNHeMhU-PkpVcFhNUEOML_eRwm_UVsAelxtNM0zN4qyLSShvSrEWAaWc8c2jzzcGrIjlzJTQt7WxBYOZQrO8sqLpGlK_ieaffcm0FEQX4HmJs1896ndrCNkjbvNWSCqbLuXxeiHdwk6KKvxNnNKFaxAHqTrym4UROngVB06_oqIRPdhcQRYKcMvX0hedM7s_AU3C6SwoZjJLUL_5cnBnEOyJV1Mf5JKAbnof_Uz4e1kjUkBZd2slc2c7enxl-0kp5SQWoFHpuTMd6VM1LX7lEubps2XwRZMh7U4RppNcnGVsfHkQ_GoEaVrPeuH8XyMHxh_qzGOvbstt6gLh2iRYeb91PoxpOw_BIBTp-_n36uGLSjUELyOwXkp2gmvcf6hkwImunHL1VZrH4CORWD1Av6_1jWxpP_glHtoJ3CuAkxCg-D2lBze2FAJefsbIi_oWAt3EXA_Vxm4CKYzvtZDcgQklQI2knSI5qq-W3I0mgsROEDJ1bo5VLyUVURDL1TljScmuE4HDf7n4wpGGPMEPdtTuQwhD0jghfUsKkCYoxHWlhnzvhGWS7CIW7FJOZaAt2leXfVWAtFY..xT0jK9-UAy7iiTnBKyPGUrWVvJCO1d6OhvZpy7AnTnEnQmPsv7k7LgNPMvfbbKT4Q1n7cVgTpXcQhclLtYd3_S0PpSbgeAAJA99ty1UIBYd1SSNMX3fWRboS2UXziAm6clXDPWPVuf5DaqsnzSsC1WFLoLXSgl8NMo6rnST9eu0b-cSOp766f5e2sry7P37TeD6on7f3Z84SVBsJp4Zv76pf1KKAK-43cebvBklP0v6AawtsBdEg3GYKN8weoiWh_lK3nhyhAbfNb3GTVTIlBdpDi3Kjb0r8j0hLOQEIIH3AYPdSiqyOVqLELTV2Cj4r8AKLRpCcstg5s54WSUTDgyW1DT1cI2XiEEXn3lfUmozXWK2QrWwODaGsLTGOq23K8g.
Figure 57: HPKE-17 JWE Compact Serialization

A.20. HPKE-17-KE 

{
  "kty": "AKP",
  "alg": "HPKE-17-KE",
  "kid": "ScO5bGaDpICDY2GH0-AgPOdiiBZ64b3GMYgK_DCipW8",
  "pub": "w0BJS-I7K6edZlsmZ6QLO5uejlBh3qa0GjVQnhygRiaJ9PJR8jECQYlMCKK72jVVzIK0fQevfnKZkkFp7kiPoLbMmmBjouGPEmjDgfMJTOCeKpyewrlX_Ahc0KaYwvM1E5pscjYRrQwoq8YO0HlzCdWpUTCwaehoX1kXm-gVSmhBReN6OPfL0vWE7NKxifEmVGLPW-aoyBTB1sUzVARZCTesM4cNrRNfA4aY7Ce1DzQ5qpZBrHVsf6ODu4kC7ddbVaOvueqBwbAg5BZ-oWRSauqHczrG_JWb2YJ00EoTrsRZ0GMr4LczqFk0XPTOJSweoAFeniRmBitmzGyRjwDO1zavG_ibZua4BHvMPygVqTQR83xY3vFbhKpMOMyec1QyyNJsnqpmowVSi0A0P0tGcPx3PHUfQ4c_LpjJiIeXPTQqWNlt2OfLqAMG9-GiJ8WmdwXOYfglpDS5oRLJ_GmB3shHxpOzrno7_eq3dsKpKrB0oZdoLNlVRWBiSBdal6FaCWKD98R9m6koxFw9jVFOF5IcYSm3sPC4aXpcxClfWRZIttYT2UReLKemckNij9zGFfEM68u7C5fM8HYvKQTOP5MrFEdMxteIYVOt9JJmaYCNXApMOHG3SLYq7cWVRJdIgDaxL_W9_BNW9ZyYfnh6PxzAW_ZimxYgj3p7_twlJGNG8PM0zKRtJ9G2Igm1Y6qHXlxTM0dMFWo1VETEdmmgJxIMstG17vw_gjtmKnw69KHGZ0IjrpAeUNgQekVjotQXCqinbMjLaqAHCiButOUIS5IXG9JvdwIeuFeRnjlwj9mdY0KQp4AByAGBl1Mc2nof57KhZIRUrMEMpQpMuSCkfsRfv2JFIJQ6bqyneUVcjYRKOFcCiOBCPrF8wcd6zDvHbDd9JUU3wZIvjlp_4oFy7ptaRGkLotqXqyoC86FvgXJs-gBLUgpam_bDgoeaDMYxERG6jEZPF5WnyagKdtzIBFlJURknJtvK86U1Cqi3qQM37zOoOYhe3AQpDAsb3QVNxOlGavt3J2kwi0lbp1YQa3gO1MJi_KEYQgkWTDWT_YdoC3w8IvsbFDCpsShfp-VIFXYV_AuOv0NY2DmPg6OQpvwQ8McFrek_XfWGBvEPcnzLAkdaXSaZgNcY9YNC7zIwkBSEI2EeE-MTCBQDVSCm5mYBYBQgoTWsOSmG3Ow4dRqANzKbhbKLHVZIeIUdYfRVY8wVU5EHLIEue4RIJJJH4Zh88AyvdBhP5nqUvUObQBhzTrMWeqVlccUVuVsghNZl5rUJpudtFlRgLUYC-jGAW6ozgUuTCjqSbJR1WjF1zzdbspaT0rotuOddEhguXfmMPCsTosidjhiwN3ZkTrx5cSCIj8Y-9QrD_SFtULcHf7s7U2NwSuHH5EMaoRiXv7UpgbZD8Xt49aZtdXuCpWxIfYI8pyAG57eogQMhg1wj9cVc67pvvbVn4kFv0hCSEiZRbek5ZYadXcJUOgSZFdAAlAxSq2wgrZlG0_QaU-A2_By3HRA9bVvEsjxz-RaSNZFjubynj3sql-ZxKNkW0IqF-Vs-7uZIzNgOK8aV1ZwCWzCHdkIzMykoVCW-CRPLm7TGZitlQgtVu5Fs6gs5UnSem_lcnGA52QpwK3s7X8bMFTBJ7cUDznh7_Cky41DA3qDPp1BW4hSKZ7hK_vgNeVURwvBP7GdweHs5K6TOJAyje5pU9ATEF_q_caVUZ4l_OhZg9Ed8otB-FEJC85W7Oqy4o9cFJaOBuqUZmZXGt9NqQCEZQJVI2ToNpUVKHVZqaGKKU4zOLGbK6FxU74zPQQYpfElevAdPrWYJk_wKxgpuVJggqKm_w5IOyhwavbUJVWJS9tiw3va-Z_bLPAW0_tm3afYw1JvBDxeLlNnIOGxPJChVQmMg2VBdIPc2fYhwvmGwmlN4q9Ca8zcZ2qtWHwVYgJQ3A7gGH1g48lk0UklMvxllt7kTwue7CmscRkgGcEHHo5wTyaacsEc8LumQn5J1BiUpptKtRmWAGuGrFcq407Ro27s5PUSJCum-LBEQbIKASXubtSvP6wrgowcNp3nga7FFJ6mCZDU6hlZEmyLLSHk",
  "priv": "wuj6hhHH-LFGeeNM1F5RBG35DVA6WD7wBwMw9KwvPRtaS0XEDDIPp4gP9cpp9BjaqlwLvEKhZR2sXlJYD95fBg"
}
Figure 58: HPKE-17-KE Private JWK 
{
  "protected": "eyJhbGciOiJIUEtFLTE3LUtFIiwia2lkIjoiU2NPNWJHYURwSUNEWTJHSDAtQWdQT2RpaUJaNjRiM0dNWWdLX0RDaXBXOCIsImVuYyI6IkEyNTZHQ00iLCJlayI6ImYwS0VsUmQzNk9VeUQ2NmUwdDktN2h0ZVBpZzVKZ2FzbzFjTG1WVUlNWnp5eW9qQnF6NWZqV2NoT2VXYkZPQ0JqVGxZYWxkYWE4bXd4bk82VHVUWnlxb3EzT2dyUGRUUW9zVllIVXRrWHUxNkZTTzdpOTFrVndDWDJvdkljOEtOQmlTbFBqalFFTFY4OGR6ODdONEFieHRtSjJ6SzlPZUh0NHZLZ0RtZkJkcjFqMFJXSnNXZ2xNUVkySVRGZTgzTGZSTDROczNoX1pkdGhzVF96MVg2SVJ0bExjcEZhUjlJTTRBcVRnN1R2NmJ2SzRHOGNCaHZKRldzaFAxVW02VmttTFh1NUdCcXlzUGRKNkVwa296Y1hPZERKaFBVSEhpSUxWTklHYmUzTEdJRzE5SVFFRy1lOUZuWW8wRURLQW1oQnBlTEJCLVZmY2RjZV92QlBoX3J3S0VnOTBha21UVEc3SGo4Ykp1STBvRlZ0YUlpOFI4X2FnNmlpYklGQUFvY1ROc3pVVFVaN2ZMNnIzQ1NUWTBzeDFsQ1VGZEN4dFBjY2tueGt1WFVkVEsxa25Tb01nbVVadHN1Q2h3d0ZWcFlxTmpEUnpNaXdyMlBrZVhRNmMzeDRYSTZXZEtNN2I5VS1wU0txenowdEZXOUtvNVBFTUNrd0xwZG4zbDA2WnhDWEpyNmk2bThKRGg5ZUNWQldOdWFialY5SF9hNzVDSTVmN1FZVEZvYXhJbllZTENsUDNCTXNEMzlBeXM4LXcyM2VPZURyeDBEQ2M0QUVtRVY2a2NrS2FhVUNndENfTXFLQ2ZXQ0tISE9MYmtnOUh4d0tlV0pmbVJFZjFLdzF3V1d4TFpnQ3NlQlpEa2JvSXBic3Atd1FrdHhwQUZaei1YTlo0UjdGNGtaMHIxbXBRUUVRODRIaXNER2tubU8xTTh1eWh3MDFQblJQcmo3U2l3QzB6ZjZ6SVpmZnRoZFRfTjFmQUlhU2lYdVBfaVJMTXcwZFZNZVQ4eFBFN2RObWE4emxRS3F1MHpGd1VkaV9BMk9PVEZWUXo3YWMwZ3JZVXB2Wmx5NnNIeHVSVnFsQ0xzUVQ3YlRHUWVDNVhEdExVVWdBeGlsZzYxWjJsa2JqSUYxeWFMQzRtektCWUhJM09jYXp5cGpxNDFyOWhJUEVMdm54TGJpUVlxWXVYeU5mU09DcHo1Yk82NExTa2FqV0ptdkZDdzNkRVJuNUhfY3FmMWdVbVhHMGExYXB3ejRhd3ZCU3dqTWE5RVRoR0c3X1hjTW5CTDNtNVR2Q2ZZd0VzQVdDWU53X2I0UHFEQldLRmgwUktyMHZQSTlqeXBLbHp4X1hlRmVZazlFUWhacUtWSXdrWVFkZXh1UE5HeWwtc3hXTXhaTEZXZ29vV1NWOFpsbW5GblhWN3F0d0RaOVFMVFYxdlFtalItQUFlV1hseEVSVkN3dE9PTk9udUdLSU5xN3FPa1ZzWXgzQklOMko4MjVjQV8yRlpTemtwaDd0eEYyX1JBOGdnM0FOM1M4Z1R2UGF0MDgycXJ4VEtVNDVaSGlHenUyclp4X3I1YmllckNDNEUwMllaNXBxdW55Ym10LTd3N3BmNUVIUlEtYnpMSzJaT2dLcXVueUVkWC0wYTB2VXo0V2pLSzhVc1FSYVd1QUVVOW5NenpURXhibTE3OHF4OVNtY1otT3F3NW5FdE1RVGZhNzUzZXN1cHBWV2VTSzgwOGtNc3dTMUo5Qmx6WlN1cmoweTk5MHI4Zm05VGk1M0hjVENmajdYZFlrZE5BSGU3dTlpNjFoeGVDdXhuTjZvNHFsQ3ZRVXhPcmJNVnFVWTRPLV9ha1NDY3VRRlF2RnZ4TE1ITnRYSXRJcGp2YWpuZXRGZ2xzZjBUWE5DTFVlWGlBSWJYMEt5YThPbFFiaTl3dWZtZ3Bpdk5LLUppdWkxT0VqNXhJWDQ4akRhYjNONmtTUDNSRmhhd3BpZk5oanJKRFR4OC1FYl9CRFZhT2RfNTNObGh3MTZnQlVVZVM2V1BfOWJiNGJXNUUwY1VQSHIwaDNndzAtbzRrdG9oMVJaNEZ1ZDBFMW1VdGFhMlV4ZTNFbEVTa05PeVRyalJBcTBEdDhfeTZ1UXEwVmJmR19yMkV1LS1HZXVnSHE5WWtPVUY3dGlYUFUxUGtrTzdFZHU1NGRuMVpZZ05fWWNmYVhtb2duNTNLNktfdnVaaUdHMDYycFVaWUlheWRKeTdJZlRyNE1pMFAweFd2aWdUWHBPWE0tby1PUXdSLXFxa0x3UnZ2UTRIR1BycXdiRzFGTjNNQVFtMXMyZVc0eGRlRDIyc2FsOGJxZWJhcDdBSVk5TkVXQU16M1liS0J0V1oxSUFfcUxYTEhCTmg2YkFwQ29iR0ZLWDFmWlNJbXUxS21rOFdKdlZLdnZxS19KdWpSTTgySkNES25RMWR2M2ZuTGY5cTMxYkRSWUFpRGhYay11UWR4OGg2bFBkN2JyVzdLWS1TMFlZem9nSzgzSjhpdjVmbmNoVXVXd1ZoZ2o0V3k0N2J4aGlqX1VDTFo1czBfaU5SQ2ZqckExak91ZXZpVlg1eHhnal8wQzNEZWV1Nk1IdUdUTUFUVXdlcXQ1SlZFT3E4VTlmZlpkSUtkSFJCQWtQcW01V2RQY2dpM2JGcS1adW00OGNOelFPekgydklla29aRFVjSURuc0lCbjB6a0xhWGR2X1loTUY1V1BiQ1FUTEpUdEhTUkhRSmlLc0l2aXF0clRva2d1SElVanJGbVdhcTdZSG9GYnlQYyJ9",
  "aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc",
  "iv": "ie1uRIh1QAjzBCMP",
  "ciphertext": "BQyNsRtSyKye3PchLTA-F57QxBKPz0ybfT4OjErHPVgw_YhXq8E1cf0Ic5X4U0AYRDiPkM-oiPI9cH5de3yMyp7HpE63vJFon0NcmQIW_PfaKYwHLC-lMCfWak0G7KknHrgJVdxJEcM32xNY1Jdt169ALYhXuX0zsoQXXLGjMAkqx2KYg3i3V8LR-bOkvtDNvmD76ERksJyxlRQ9WlWV3YIwdNI51Ukb7W3OkB-Ru8SgmNgFxl6v3qhVHcxSaCom8d7mvUzL39ZFAEJ4Ptym-RBTeFnN-JSC-h7daY8YgvXJ8KN43qz5xjmNlS3N7_lYihQcFYoctLx3i2uKol5DtsAXBuzXnP0FwfNc3D6pf_mH",
  "tag": "MoT1JqpZDCUTTO_E5gvVGA",
  "encrypted_key": "T7l2Fu6qI82x4z2D-C8Yr3X9tnenDn3Dn-fECMFHyyepjgST8-V6g90R4J5UXPOV"
}
Figure 59: HPKE-17-KE Flattened JWE JSON Serialization 
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.cqktZbmzNM6suR35Fo58t8TX1Va2coa3nBew_9zPYCN4U7U3OBJSVBp9xzkHyWjb.vLZG2Bhl70LQ3Czq.HKHHAMX9ZCDFDWlAFDAS6v1F8kGa87Z_fOMEom-i7RsJ78egA4v7KRjRW6khjBQe6shQyaBwsfUi8q1gmf7KAkVBL3KmqspIkr6hB5rXyXhqRx4qnDdABMGguqjT7f0d-vdI8L7sbqyMZIS8bq-NFQcPVX1ZCl0-8Mf6-W3KIYFro14-baQ5Xm_voWGvqnv4-GPbpQOBuhWiVobwbeIZnSKZyv389WCuDP9FvsmH26_rdPjHPw_rKe1gFUp_DnGsvgbwPYLE-rMCQC6X6TYBxG2uYJxizx2ZRVBQFFObQE9hF7CFZqEQYXYXtNvDIKeLX6l9yjxLl7ex51i7LmeK_BElee7HyAjN6GIXYCErQTXn.b2q_tDZNhXze_1JIv9ZQew
Figure 60: HPKE-17-KE JWE Compact Serialization

Acknowledgments

TODO acknowledge.

Document History

draft-skokan-jose-hpke-pq-pqt-03

draft-skokan-jose-hpke-pq-pqt-02

draft-skokan-jose-hpke-pq-pqt-01

draft-skokan-jose-hpke-pq-pqt-00

Authors' Addresses

Filip Skokan
Okta
Brian Campbell
Ping Identity