The Codebreakers by Kahn is available at some stores. (Powell's Technical books in Portland, OR has copies. It is right next to Applied Cryptography.) It has not filtered down to some ordering systems, so some bookstores claim it is out of print. Warning: The book is $65.00 hardbound! (It is also *NOT* a small book. It is large. About 2000 pages by my guess. (Maybe more. I was being pulled out of the bookstore at the time. My wife was trying to save me from the evil mind control rays of Powell's Tech books.) I know what is on my shopping list for Christmas. --- | "Spam is the Devil's toothpaste!" - stuart@teleport.com | |"The moral PGP Diffie taught Zimmermann unites all| Disclaimer: | | mankind free in one-key-steganography-privacy!" | Ignore the man | |`finger -l alano@teleport.com` for PGP 2.6.2 key | behind the keyboard.| | http://www.ctrl-alt-del.com/~alan/ |alan@ctrl-alt-del.com|