Secret Codes: Coding & Decoding

Codes, Ciphers & Codebreaking -- Technical and historical introduction to codes, ciphers, and codebreaking.

Secret Codes for Scouts & Scouting -- Introduction to secret codes for Scout and Cub meetings. Codes make great games for all ages, and they're not too difficult to learn.

Decoding Nazi Secrets -- Companion Site to the Nova's 2-hour special that chronicles how the Allies succeded in decoding secret messages from the German Message Coding Machine.

The Secret Language by Ron Hipschman. Explaination of substitution (decoder rings, cipher wheels, diagrammatic cipher ) and transprotation ciphers (scytales and other systems)

Crytography, Encryption & Steganography -- Bibliographies from 1986-2000

Cryptology by Oliver Pell -- History, types and uses of cryptography.

Cryptology ePrint Archive --rapid access to recent research in cryptology. Opportunities to discuss, contribute and submit work for peer-review.

Codes & Ciphers by Steven A Kallis, Jr. -- Explaination of enigma, polyalphabetic substitutition, Caesar substitution

Cryptographic Compendium by John Savard -- Outline of the various types of historical cipher systems, route transcriptions.

Navajo Code Talkers' Dictionary --Declassified under the Department of Defense Directie 5200.9

Learning Pig Latin -- somewhat silly nowadays, but still fun.

Famous Unsolved Codes & Ciphers --list of "to do" items for decoders, including those from the Zodiac Killer and Richard Feynman's Challenge. Plus, famous finally-solved codes.