权限层次划分的P2P信任模型

在已有信任模型的基础上,提出一种新的P2P网络信任模型。模型不仅计算节点信任值,还量化节点的资源付出值。在计算过程中,节点服务活跃频度和评分行为相似度被用来计算节点的全局信任值。依据节点的信任值和付出值划分权限。位于不同层次的节点,所拥有的权限和服务范围也是不同的。仿真实验结果表明,模型能较好地评估节点的信任度,继而明确节点的权限层次,资源请求者据此可以做出正确的选择。模型在一定程度上能缓解网络拥塞,进而提升网络的整体服务质量。

A P2P Trust Model Based on Privilege Hierarchy Partition

Based on existed network trust models, presents a new trust model for P2P. The model does not only compute the trust value, but also cal- culate the payments of resources. During computing the global trust, the activation frequency degrees of services and the behavior similar- ities between nodes are taken into consideration. Partitions the privileges of nodes by using the trust values and payment values of nodes. The nodes in different privilege levels own different power and works in different scopes. Simulation results prove that the trust model can effectively evaluate the global trust value and decide the privilege levels of nodes, which can help resource requestors to make good deci- sions. Relieves the network congestions and improves the service quality.