The Implementation of the Wheatstone cryptograph (see http://members.aon.at/cipherclerk/Doc/Whetstone.html) is complete along with tests. The doubled letters substitution letters (prior to enciphering) is also implemented so you will have to manually replace letters in the deciphered output.

The ChaoCipher (http://www.mountainvistasoft.com/chaocipher/index.htm) cryptosystem, invented by John F. Byrne and submitted to the US Army has finally been disclosed and published along with some plain/cipher texts. See the ChaoCipher clearinghouse forums for more details on how to recover the keys with known-plaintext attacks.

I have implemented along the way a slightly different way of generating plaintext/ciphertext alphabets using the key shuffling algorithm I have in the checkerboard system, you can specify short keys that will be used to generate a complete alphabet.

When Playfait was first implemented, I choose the 25-letter alphabet without the Q instead of the other option of merging I and J. Revert this to be as close as possible to the Wikipedia implementation.

A clone of the main repository on archives.keltia.net has been established on bitbucket.org along with calife.

http://bitbucket.org/keltia/old-crypto/

An implementation of the bigrammatic Playfair cipher, invented by Charles Wheatstone but popularized by the Baron Playfair has been added. Test data provided by the Wikipedia page on Playfair.

Hoe is a gem packaging system built on Rake rules. old-crypto now depends on it for several rake tasks and future packaging as a gem. Hoe will add its own dependencies on rubyforge. You need rake of course.

More info on playing with Hoe here.

Both the Nihilist (variation with transposition as super-encryption) and the ADFGVX ciphers have been implemented along with tests.