面向对等网络应用的信任与名誉模型

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。

P2P-oriented trust and reputation model

The P2P(peer to peer) technique is now used in many areas,but no good solutions have yet been developed to set up trust among peers.This paper presents a model,called P2Ptrust,which combines a local trust table and a global reputation table.Each peer endows a trust value to other peers respectively whose trades are trustworthy.And the values construct a local trust table.Each peer must save several global reputation tables which belong to other peers.This model uses the friend mechanism and unites the virtue of the local trust table and the global reputation table.This paper also introduces a solution for the sybil attack,the malicious collectives attack,and other such attacks.Simulation results show that the P2Ptrust model reduces communication overhead and is more robust with security and has better extensibility.