"Bitmessage is a decentralized, encrypted, peer-to-peer-based email network that can be used by one person to send encrypted email to another person, or to multiple subscribers. Bitmessage encrypts each users' email inbox using strong encryption and replicates it inside its P2P network mixing it with inboxes of other users in order to conceal user's identity, prevent email eavesdropping and protect the network from any control. The Bitmessage protocol avoids sender-spoofing through strong authentication, and hides metadata from wiretapping programs. The software experienced a surge of new adoptions resulting from Edward Snowden's disclosure of the National Security Agency's email surveillance activities. Currently, the network processes more than a thousand private messages per week." -- wikipedia source code: https://github.com/Bitmessage/PyBitmessage [there is a ebuild.sh script in the source tree which may be helpful] compiling instructions: https://bitmessage.org/wiki/Compiling_instructions
A 9999 ebuild from the bitmessage forum: https://bitmessage.org/forum/index.php/topic,1413.0.html
+*pybitmessage-9999 (22 Jul 2013) + + 22 Jul 2013; Julian Ospald <hasufell@gentoo.org> +pybitmessage-9999.ebuild, + +metadata.xml: + initial import wrt #477080
