一种基于D-S证据理论的P2P信任模型

摘要

To the problem of trust models based on D-S evidence theory can not combine evidence information reasonably, a new D-S combination rule, IDSECR, is established by allotting the conflicted probability again and introducing weight coefficients. It establishes a trust model by IDSECR, Trust Model Based on D-S Evidence Theory for P2P networks(DSETTM), which solves the problem of not invalidly aggregating incompatible recommendation information in the traditional trust models. Simulation experimental results show that DSETTM has a much higher transaction successful rate under attacking of different types of malicious peers.%基于D-S证据理论的信任模型不能合成证据信息.为此,采用重新分配冲突概率与引入权重系数的策略,提出一种改进的D-S证据合成规则IDSECR,并将其用于P2P网络的信任建模,建立一种基于D-S证据理论的P2P信任模型,解决传统信任模型无法处理冲突程度高而引起的信任度计算不准确问题.仿真实验结果表明,在恶意节点攻击的情况下,该模型具有较高的交易成功率.