基于评价向量的P2P电子商务信任模型

针对现有P2P信任模型中交易因素考虑不全面、缺乏恶意节点识别机制而导致无法防御恶意节点共谋攻击和耗费网络带宽等问题,提出一种新的P2P信任模型EVTM,该模型采用向量化的方式表示评价的标准,引入时间衰减因子和惩罚机制,促使模型中交易节点积极地、正确地评价,从而构造一个诚信、可靠的交易环境。仿真实验进一步证明EVTM不仅可以根据用户的不同需求对交易对象做出更合理的信任评估,而且能有效地避免恶意节点的共谋攻击,从而降低交易的风险,减少损失。

Trust model based on evalution vector for P2P E-commerce

As the problems of existing model,like waste bandwidth,many transaction faction not take into account and can’t avoid collusion attack by malicious peer,we proposed a novel trust model named EVTM(Trust Model based on Evaluation Vector),by improved and optimized based existing P2P trust model,introducing time attenuation factor and punishment mechanism to encourage peer provide positive and correct evaluation,construct a reliable deal atmosphere.Through the simulation experiments proof the improvement and advantage of the model,not only make users to make a reasonable trust evaluation according to their different requirements for transaction object,and can effectively avoid collusion attack,which reduces the trade risk and reduce the loss.