This is a Python implementation of FiSH for XChat. It's made by Nam T.
Nguyen and uses irccrypt.py by Björn Edström.

Unlike FiSHLiM it also support key exchange (DH1080) and a more secure
block chiper mode (CBC).

I keep it here in case the original source would disappear from the
Internet. The URL is:

http://www.vithon.org/forum/Thread/show/54/FiSH_encryption_for_X_Chat_Python.html