基于偏差因子的P2P网络信任模型  

A Trust Model Based on Deviation Factor for P2P Networks

作　　者：潘春华[1] 朱同林[1] 殷建军[1] 刘浩[2] 

机构地区：[1]华南农业大学信息学院,广州510642 [2]华南理工大学计算机科学与工程学院,广州510640

出　　处：《北京邮电大学学报》2011年第3期89-93,共5页Journal of Beijing University of Posts and Telecommunications

基　　金：国家自然科学基金项目(30971694);广东省产学研科技攻关项目(2010B090400493);广东省工业攻关项目(2010B010600046)

摘　　要：针对现有对等(P2P)网络信任模型大多假设在一种理想的环境中,很少考虑节点内部和外部环境影响的问题,提出一种新的基于偏差因子的信任模型(TMDF).TMDF通过引入内部能力和外部能力的概念,构造多维评价向量,参考了社会网络中信任关系的建立方法,分别从2个方面计算节点的可信度,通过引入偏差因子计算推荐节点的推荐可信度,最终根据直接信任和推荐信任计算综合可信度.分析和仿真结果表明,该模型可提供更为真实的信任服务,并对抵制诋毁、共谋等恶意行为具有良好的抗攻击性能.In the existing trust models of peer to peer network, the internal situations and external environments of nodes are not considered in the process of calculating the trust value that will affect the rationality and objectivity of models. To solve this problem effectively, a new trust model based on the deviation factor （TMDF） is proposed. Introducing the structure concepts of self-capacity and external-capacity, the model gives a multi-dimenslonal evaluation vector, it comes from construction approach of trust relations in the social network, in which, a peer＇ s trust value is calculated according to two aspects. TM- DF calculates the recommended trust value of the recommended nodes using the deviation factor and calculate the trust value of nodes by the direct trust value and the recommended trust value. Analysis and simulation show that the new model can provide the more real trust services, identify and resist the malicious acts, such as slander and conspirator.

关 键 词：信任模型 偏差因子 内部能力 外部能力 

分 类 号：TP338.8[自动化与计算机技术—计算机系统结构]