This is an encryption plugin for irssi, it is based on blowfish and is fully
compatible to original 'blowcrypt' script. It supports private chat and channel
encryption. A secure key-exchange system is included as well. Please read the
file FiSH-irssi.txt, especially the 'Installation' section, before installing
it!

WWW: https://github.com/falsovsky/FiSH-irssi