DKIM and its use in CanIt
This video describes DKIM and its use in CanIt.
This full length version contains additional details describing the DKIM-Signature header, the DNS record containing the public key and extra information about hash sums and the difference between encrypted and signed data.
An abridged version of this DKIM 101 video lacks those extra details, retaining the higher level explanation of DKIM and its use in CanIt.
[NOTE: Best viewed in 1280 x 720. Double-click video and/or use lower-right controls for better resolution]