A multitude of privacy breaches, both accidental and malicious, have prompted
users to distrust centralized providers of online social networks (OSNs) and
investigate decentralized solutions. We examine the design of a fully
decentralized (peer-to-peer) OSN, with a special focus on privacy and security.
In particular, we wish to protect the confidentiality, integrity, and
availability of user content and the privacy of user relationships.