Implicit group messaging in peer-to-peer networks

We describe “implicit group messaging”: a form of many-to-many message delivery that does not require publishers to enumerate recipients, or recipients to join explicit groups. Instead, publishers specify the characteristics of intended audiences and the system dynamically attempts to deliver messages to all matching members. We study this type of message delivery in the context of peer-to-peer networks, discussing desirable features of such a system, and presenting a novel model based on a distributed overlay network and geometric routing protocols.