Files displayed during class
The main site for the textbook The errata list for the text A text file of ciphertexts for some of the homework problems
An AES emulator AES in 3 minutes AES in stick figures
A nice reference for the Square and Multiply algorithm Diffie-Hellman parameters recommended by the Internet Engineering Task Force
A few classic xkcd strips on cryptography Security Legal Hacks Cryptography Password Strength