P2P网络下基于推荐的信任模型  

Trust Model Based on Recommendation on P2P Network

作　　者：郭成[1,2] 李明楚[2] 姚红岩[1,2] 胡红钢[3] 

机构地区：[1]大连理工大学电子与信息工程学院,大连116024 [2]大连理工大学软件学院,大连116620 [3]中国科学院软件研究所信息安全国家重点实验室,北京100080

出　　处：《计算机工程》2008年第24期157-159,共3页Computer Engineering

基　　金：国家自然科学基金资助重大项目(90412007);国家自然科学基金资助项目(60673046)

摘　　要：基于推荐信任机制,引入正态概率密度函数的概念,对信任度进行描述。提出一种对信任度进行概率分析的评估方法,可动态地适应用户的安全需求,减弱在多路径推荐中由于恶意实体推荐所带来的负面影响,提高信任计算结果的稳定性。分析和模拟试验表明该模型的必要性和有效性,可以更好地解决P2P网络带来的安全问题。This paper introduces the normal probability density function to describe the trustworthiness, and presents a trust evaluating model for quantifying the trustworthiness of peers based on recommendations, which can dynamically adjust its security level according to user＇s request. The model is more logical to the social network than before. It introduces a probability method to relieve the influence of multi-path propagation of trust and improves the stability of the result. Analysis and simulation show that the new trust model is necessary and effective. The architecture possesses several desirable properties that are increasingly suitable for security requirements in the P2P networks.

关 键 词：信任模型 推荐信任 对等网络 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]