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A peer-to-peer chat program that uses public key encryption (via Gnu Privacy Guard) to keep your conversations from the eyes of packet sniffers (*Cough* Carnivore *Cough*)
RotNN is a Python module that implements rotation encryption/obfuscation. The default action is similar to rot-13, but it can also rotate over the entire UNIX printable character set.
cryptshell is a shell used for analysable code (eg anything before wwII). It automates letter substitution, transposition, and has modules useful for breaking various weak ciphers (enigma, substitution, vinigre). It has no real practical value.
We're working on developing a standard encryption API for the Python language,
and building a set of standard cryptography modules. The CVS tree is open
to anyone who needs it for a Python/crypto related package.