基于Dempster-Shafer证据理论的信任评估模型  

Trust Evaluation Model Based on Dempster-Shafer Evidence Theory

作　　者：袁禄来[1] 曾国荪[1] 王伟[1] 

机构地区：[1]同济大学计算机科学与技术系,上海201804

出　　处：《武汉大学学报（理学版）》2006年第5期627-630,共4页Journal of Wuhan University:Natural Science Edition

基　　金：国家自然科学基金(60173026);教育部科研重点(105071);上海高校网格技术E-研究院基金(200301-1)资助项目

摘　　要：从网格的动态性、分布性、不确定性等特征出发,参考社会学的人际信任关系结构,提出了一种基于Dempster-Shafer证据理论(简称D-S理论)的信任评估模型.该模型根据网格节点间的历史交易记录,给出“直接信任”的形式化描述,建立网格节点信任推荐机制,并利用D-S理论对证据进行组合,从而得到“间接信任”.然后将直接信任和间接信任进一步组合为“综合信任”,从而有效实现信任信息的融合.将本文提出的信任度评估方法应用到调度算法中,结果证明了该信任模型的可行性和实用性.By analyzing the Grid characteristics and referring to the trust relationship of social people, this paper proposes a trust evaluation model that is based on Dempster-Shafer evidence theory. This model introduces the ＂direct trust＂ according to the trade records. The ＂indirect trust＂ is presented by combining the recommendation evidences, while the ＂combined trust＂ is proposed by combining the direct and indirect trust, so as to implement the complete fusion of all trust information. The application case efficiently proves the trust model proposed is feasible and practical.

关 键 词：可信计算 网格安全 信任评估 Dempster—Shafer证据理论 

分 类 号：TP393.8[自动化与计算机技术—计算机应用技术]