RepCom: Towards Reputation Composition over Peer-to-Peer Communities

Peer-to-peer (P2P) communities over the Internet contain a large amount of trust evidences that can be used to compute the reputation of peers, but existing reputation systems merely uses the evidences within the scope of one community, neglecting the social characteristics of peers´ reputation that can only be actually derived from information based on all communities they participate in. We believe that Internet requires a reputation facility that derives the reputation of peers from evidences over the Internet. In this paper, we propose RepCom, a novel reputation composition architecture to collect, transform and combine trust evidences among P2P communities. RepCom introduces the reputation authority network (RAN) to publish, search and retrieve evidences of peers, and uses a logic-based engine to transform ad hoc evidence data into computable local evidence rules. Finally, RepCom combines the analytic hierarchy process (AHP) and weighted score method (WSM) to compute the final composite reputation of peers that comprehensively reflects their global behavior and certified attributes.