由于P2P系统的开放、匿名等特点,使得P2P系统对节点缺乏约束机制,节点间缺乏信任。针对以上问题本文提出了一种基于主观逻辑理论的P2P网络信任模型,并在信任的计算中引入风险的机制,有效防止协同作弊和诋毁的安全隐患。实验和分析结果表明,这种信任模型能更加精确地评估节点的信任度,从而能更加有效地解决P2P网络环境中存在的安全问题。
Trust manage is new and important for security in peer-to-peer system. However,the feature of the peer-topeer system such as user anonymity, open nature makes that peers are not responsible for their irresponsible bartering history. In order to resolve the security problems of P2P network,in this paper we develop a trust model based on the subjective logic theory,and a definition of risk is presented. By doing this, we can evaluate the trust relationships between peers more precisely, thus can resolve security problems exist in P2P network more effectively, which can be verified by simulated experiments.