Distributed Social Networking Protocol (DSNP) allows everyone to collaborate to create one social network that is decentralized, like email. It is an open technology that supports private communications, in a manner that users of modern social networks have come to expect. The current version of the protocol is 0.6, though the project has been discontinued. The leading author is Adrian Thurston.
References
Distributed Social Networking Protocol Wikipedia(Text) CC BY-SA