关键词: 服务中间件, 信誉组合, 信誉证据

Abstract: Peer-to-Peer （P2P） communities are essentially distributed systems in which peers communicate directly with one another to exchange information and execute transactions， and one peer usually participates in several communities. Existing reputation systems merely use the evidences within the scope of one community to derive reputation scores of peers， neglecting the social characteristics of peers’ reputation that can only be actually derived from information based on all communities they participate in. This paper proposes RepCom， a novel reputation composition service architecture to collect and manage trust evidences over P2P communities. RepCom introduces the reputation authority network （RAN） to publish， search and retrieve evidences of peers，and uses a logic-based engine to enforce community-based trust policies on evidences. RepCom helps to construct a novel service for reputation management that comprehensively reflects global behavior of peers in various communities.

Key words: service middleware, reputation composition, reputation evidences