基于D-S证据理论的P2P信任模型  

P2P Trust Model Based on D-S Evidence Theory

作　　者：秦永召[1] 高慧敏[2] 

机构地区：[1]太原科技大学电子信息工程学院,山西太原030024 [2]嘉兴学院机电工程学院,浙江嘉兴314001

出　　处：《嘉兴学院学报》2013年第3期43-47,共5页Journal of Jiaxing University

基　　金：山西省自然科学基金(2009011011-3);山西省回国留学人员科研资助项目(2011-078);山西省软科学项目(2011041001-02)

摘　　要：P2P系统的随机性、不确定性、开放性等特征,使得P2P系统缺乏必要的安全保障及控制机制,由于存在大量的恶意节点、虚假文件等恶意行为,系统容易受到攻击.而基于D-S证据理论的信任模型,在D-S证据理论的基础上,通过加权平均、期望和方差来确定信任度的取值方式以及不确定程度中的可靠程度,并在模型中引入风险机制,在一定程度上能够降低协同作弊和恶意诋毁所带来的安全隐患.The features of P2P system such as randomness, uncertainty and openness make P2P system lack necessary security and control mechanism, and due to some malicious acts,such as,malicious peers,false documents, P2P system may suffer attack easily. In order to resolve the problems mentioned above, this paper develops a trust model based on D-S evidence theory, utilizing weighted average , expectation, variance to determine the value of trust, reliable degree of uncertainty, and in addition, a mechanism of risk is presented, so, to some extent, it can prevent cooperative cheat and slander.

关 键 词：P2P D—S证据理论 信任模型 加权平均 方差 风险 

分 类 号：C819[社会学—统计学]