|National Address Server
Get the zip code for almost any address in the U. S. You
can download a Postscript or GIF file of the address,
including the zip's bar code.
National Cryptologic Museum
The National Cryptologic Museum has several exhibits
Beginner's Guide to Cryptography
An introduction to cryptography.
A quarterly journal devoted to all aspects of cryptology.
This site is run by Paul Kocher and provides information about secure
Secret Code Breaker
Excerpts from the Secret Code Breaker series of publications.
letters of the American Revolution
A collection of documents at the University of
The companion web site to the NOVA PBS special, Decoding Nazi Secrets.
Information on substitution and transposition ciphers at San Francisco's
Exploratorium web site.
A site dedicated to the Navajo code talkers who served in the United States
military in World War II.