Mircryption is a free encryption add-on for the popular irc clients mIRC and XChat. It consists of a .dll library and a mirc script that provides a menu-based interface to all encryption/decryption routines.

• Channel text, Private query windows, DCC Chats, Actions, Topics can all be encrypted.
• No need to modify the way you work - text is encrypted and decrypted automatically; encryption status of conversations is clear but unobtrusive.
• All crypto-related algorithms used are taken from published, common, trusted sources.
• Encryption algorithm is Blowfish (no known vulnerabilities); encryption keys are themselves stored in encrypted form.
• User-friendly key management routines; menu driven and easy to temporarily disable & re-enable encryption on a channel, send plain text quicky, etc.
• Source code is C++ (with MS visual studio project / makefile for xchat) and a 150k mirc script.
• In constant use and under development since December 2001.
• Supports CBC mode encyrption.
• XChat plugin version runs on a wide variety of unix / linux / macosx machines (http://www.xchat.org/).