改进的P2P电子商务TM-AT信任模型

Improved TM-AT trust model for P2P E-commerce

为了有效解决P2P电子商务的安全问题,通过对现有信任模型的研究,提出了一种改进的信任模型TM-AT。将信任分为直接信任和推荐信任,提供了两种获得节点信任值的方法。在计算直接信任时,提出用三元组表示直接信任值,有效地解决了新节点的信任值问题。同时,引入了交易金额等级、交易时间、失败加速因子等5个因素。在计算推荐信任时,增加了可信度。模拟实验结果表明,该模型能够有效打击恶意节点,保护诚实节点,增强P2P电子商务系统的可用性,降低交易风险。

To solve the secure of P2P E-commerce effectively, after analyzing present trust models, a improved trust model TM-AT is presented. Firstly, trust is composed of direct trust and indirect trust, so there are two methods of gaining trust. In the computing of direct trust, a three-tuple is presented, and the trust of a new node is solved effectively. At the same time, five factors including transactions amount level, time of transactions, failure accelerated factor are introduced into. Inthe computing of indirect trust, credibility is used. Proved by simulation experiments, the model can against malicious node effectively, protect honest node, enhance the availability of P2P E-commerce system, reduce transaction risks.