pidgin-otr
"Off The Record" end-to-end encryption plugin for Pidgin
This is a Pidgin plugin which implements Off-the-Record (OTR) Messaging. OTR allows you to have private conversations over IM 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.
GPL-2.0+