[an error occurred while processing this directive]
The Code Book: The Science of Secrecy from Ancient Egypt to Quantum Cryptography, by Simon Singhcs588: Cryptography: Principles and Applications
Highly recommended (mostly) non-technical book on the history of cryptography.
My cryptography course at UVa. Lecture 4 and Lecture 5 provide some more details on Enigma and how it was broken.Bletchley Park
Website for the Bletchley Park museum, includes a virtual tour. (You can also see my Bletchley Park pictures.)WWII Codes and Ciphers
Tony Sale's site on WWII cryptography.Alan Turing
Web page on Alan Turing developed by Andrew Hodges