P2P环境下电子商务信任评估机制研究

Research of trust evaluation mechanism in P2P E-commerce

为了解决P2P环境下电子商务安全问题,在深入研究P2P环境下电子商务信任模型的基础上,针对传统信任模型不足的问题,提出了一种利用哈希函数将加入群的节点随机地分配到各个群的方法,降低了节点共谋攻击的危险。考虑到当一个节点偶尔提供一次恶意服务时,并不能证明是恶意节点,只需要给节点警告。引入了交易时间和交易规模、交易次数等因素来进行信任值的计算,利用惩罚项来限制交易节点提供恶意服务。节点的信任值很大程度上依靠同群节点和有外连接的群的节点来进行评估,仿真实验结果表明,该方法可以更加准确地评估节点的信任值,保证了网络的性能。

To solve the P2P E-commerce security problem effectively,on the basis of researching the trust model deeply in the P2P Ecommerce, a method based on hash function is proposed to put the node from the trust group into the sub-group in a random.It reduces the risk of collusion attack.When a node provides a malicious service occasionally,it can not be proved to be a malicious node,and it only needs to be given a warning.Transaction time factors,transaction scales,and transactions number are introduced to calculate the trust value.Penalty item is used to limit node to provide malicious service.It is more accurate to estimate the trust value.The model relies heavily on nodes from the group connected with outside group and the nodes from the same group,and it ensures the performance of the network.