Nikita Borisov and Ian Goldberg have released
Off-the-Record Messaging (http://www.xelerance.com/mirror/otr/),
It looks like Ian Goldberg's site might be a more authoritative source,
http://www.cypherpunks.ca/otr/ .
One interesting feature is authentication + deniability. You know who
you are
Nikita Borisov and Ian Goldberg have released
Off-the-Record Messaging (http://www.xelerance.com/mirror/otr/),
an IM plugin for private communication providing not only
the usual encryption and authentication, but also deniability and
perfect forward secrecy. Deniability avoids digital signatures
