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P 2P(peer to peer)网络已经得到日益广泛的使用。但是如何建立Peer之间的信任关系,却一直没有很好的解决方案。该文使用两种表——局部信任表和全局名誉表,提出了一种方案——P 2P trust:每个节点保存与其交易过的一些服务质量好的节点的局部信任值,组成局部信任表,同时每个节点保存另外几个节点的全局名誉表,并且引入朋友机制,这样就结合了局部名誉表和全局名誉表各自的优点。P 2P trust可以解决冒名、协同作弊等问题,模拟结果表明该方案有很强安全性和较好可扩展性,并且运行开销相对比较小。
P 2P (peer to peer) networks have become more widely used. However, how to establish the trust relationship between Peer, but has not been a good solution. In this paper, two kinds of tables, local trust table and global reputation table, are proposed to propose a scheme - P 2P trust: each node stores the local trust values of some nodes with good quality of service that it has traded, and forms a local trust table , While each node holds a global reputation table for several other nodes and introduces a friend mechanism that combines the respective advantages of a local reputation table and a global reputation table. P 2P trust can solve the problems of impostor, cooperative cheating and so on. The simulation results show that the scheme has strong security and good scalability, and the running overhead is relatively small.