P2P网络中一种新的多层多维信誉模型

P2P网络中一种新的多层多维信誉模型

张薇;宋璐;刘建伟

【期刊名称】《信息安全与通信保密》 【年(卷),期】2011(009)011

【摘要】现有的信任模型大多通过单一信任值来判定节点的好坏,这种方法无法抵抗网络中的某些恶意行为,特别是对于P2P网络中独有的搭便车行为、＂公共物品的悲哀＂等问题,缺乏有效的抑制。针对这些问题,文中针对P2P网络提出了一种新的多层多维信誉模型,通过节点的信任值、贡献值、资源值等不同维度综合评价节点的信誉,并且按照信誉将节点划分为不同层次。分析可知该模型可以有效抵御多种恶意行为及多种自私行为,并能解决传统信任模型产生的一些性能问题。%Most existing traditional trust models decides whether the point is good or not by single trust value. These models could not effectively resist some malicious behaviors,particularly the free-riders actions and＂tragedy of public things＂in P2P network. To solve these problems,this paper proposes a new multilevel reputation model with multiple decision factors for P2P networks,and this model,through trustworthiness,experience,and evaluation

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nodes,according to their factors,into different trust levels. Experiment and analysis indicate that this model could resist different attacks and selfish behaviors,and solve some performance problem produced by the traditional trust models.