IRSSI support for Off-The-Record (http://www.cypherpunks.ca/otr/) messaging, allowing you to have private conversations over instant messaging by providing: Encryption * No one else can read your instant messages. Authentication * You are assured the correspondent is who you think it is. Deniability * The messages you send do not have digital signatures that are checkable by a third party. Anyone can forge messages after a conversation to make them look like they came from you. However, during a conversation, your correspondent is assured the messages he sees are authentic and unmodified. Perfect forward secrecy * If you lose control of your private keys, no previous conversation is compromised.
WWW: https://github.com/cryptodotis/irssi-otr