一种基于模糊集合的可用于网格环境的信任评估模型  

A Trust Evaluation Model Based on Fuzzy Set for Grid Environment

作　　者：张琳[1] 王汝传[1] 张永平[2] 

机构地区：[1]南京邮电大学计算机学院,江苏南京210003 [2]中国矿业大学计算机学院,江苏徐州221008

出　　处：《电子学报》2008年第5期862-868,共7页Acta Electronica Sinica

基　　金：国家自然科学基金(No.60573141,No.70271050);江苏省自然科学基金(No.BK2005146);江苏省高技术研究计划(No.BG2004004,No.BG2005037,No.BG2005038,No.BG2006001);国家高科技863项目(No.2006AA01Z201,No.2006AA01Z219,No.2006AA01Z439);南京市高科技项目(2006软资105);现代通信国家重点实验室基金(No.9140C1101010603);江苏省计算机信息处理技术重点实验室基金(No.kjs050001,No.kjs06006)

摘　　要：信任模型已成为网络安全研究的热点.结合模糊集合理论在网格环境下重新给出了信任的描述机制.在信任的综合评判中,融入中间推荐节点的直接交互经验,充分体现了主观因素的重要性.鉴于信任的动态性,结合时间衰减和路径衰减两因素给出了新的信任更新模型.实验结果显示了模型的准确性和健壮性.相信该模型的提出能为信任模型的进一步研究起推动作用.Trust model has become the focus of network security. The description of trust is given newly with fuzzy set theory for grid environment. In course of trust synthesis evaluation, direct interaction information of the middle recommendation node is presented, which expresses the importance of subjective factor. According to the dynamic character of trust, a new model of trust re- newal is provided, which is based on the two factors of time-attenuation and path-attenuation. Experimental results show that the model is exact and robust. It can impel the further research of trust model.

关 键 词：网格安全 模糊集合 信任评估 信任更新 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]