Video: Off-the-Record Messaging, privacy for IM

Off-the-Record is an open source plugin to use with Pidgin, an instant messenger software compatible with IRC, MSN, SILC, ICQ, Yahoo! and lots of other chat software that come with no privacy measures whatsoever.

Off-the-Record (OTR) Messaging allows you to have private conversations over instant messaging by providing encryption, authentication, deniability and perfect forward secrecy.

You can watch this Stanford University lecture video explaining how Off the record works and what it can do to help you keep your privacy and anonymity while chatting through instant messenger.