Cryptography

One of the classes that is just starting up at Udacity is on cryptography - you know, encryption and secret computer codes.  While at Sun Labs I had the pleasure of working with Whit Diffie, co-inventor of the Diffie-Hellman algorithm that makes public key cryptography possible.  What in the heck is that? you say.  It is a mechanism that allows two parties to share secrets across a public communication channel.  The video above tries to explain this process in simple terms and, for the most part, does a reasonable job.