Auto Refresh
============

Since version 0.6.5, apt-dater has a 'auto refresh' feature. This
gives two advantages:

 * If one host is refreshed and got some updates, one should refresh
   other hosts which are running the same distribution and have the
   same (or atleast some) packages installed, too.

 * There are some fundamental problems on replay attacks on todays
   package managers[1]. If one has several hosts (using different
   repository mirrors and different uplinks etc.), there is a chance
   that some of your hosts got recent package lists. apt-dater collects
   update informations over SSH on trusted hosts. If apt-dater compares
   those information it could detect such replay attacks.


Links
=====

[1] Attacks on Package Managers
    (Justin Cappos, Justin Samuel, Scott Baker, John H. Hartman)

    http://www.cs.arizona.edu/people/justin/packagemanagersecurity/attacks-on-package-managers.html
