Increasing interconnectivity and data sharing can compromise data security and privacy. OneSwarm is a peer-to-peer tool that provides users with explicit control over data privcy by letting them determine how data is to be shared. Instead of sharing data indiscriminately, data shared with OneSwarm can be made public, shared with friends, shared with some friends but not others, and so forth -- an approach we termed friend-to-friend (F2F) data sharing. Faculty: Anderson, Krishnamurthy.