一种P2P网络信任模型METrust

 Peer-to-Peer(P2P)网络的异构性、匿名性、自治性等特点导致了一些安全问题,比如伪造、诋毁、协同作弊等,影响了服务质量.提出了一种基于推荐的P2P网络信任模型METrust,节点在网络中拥有唯一的推荐可信度,引入了更新幅度和更新力度两个参数来更新推荐可信度.给出了节点推荐可信度的更新算法;节点根据评价标准的相似程度选择推荐,其中节点的评价标准通过AHP(Analytic Hierarchy Process)方法确定.仿真实验表明,METrust信任模型可以识别恶意节点,有效提高P2P网络的服务质量.

METrust:A Trust Model in P2P Networks

In Peer-to-Peer (P2P) networks,peers' features such as heterogeneity,anonymity and autonomy lead to some security problems,such as forging,slandering and collective cheating,which affect the quality of service a lot.A trust model METrust in P2P networks based on the recommendation is proposed,each peer in the network has a unique credibility of recommendation,two trust parameters for updating the credibility of recommendation are introduced,namely updating range and updating strength.The trust model METrust proposes an algorithm to update the credibility of recommendation;a peer selects recommendation peers whose evaluation criteria are similar,evaluation criteria of peers are determined through the AHP method(Analytic Hierarchy Process).Simulations show that,the trust model METrust can identify malicious peers,and improve the quality of service in P2P networks effectively.