P2P环境中基于信任度的服务路由系统的研究*

随着网络的飞速发展，基于P2P结构的分布式应用越来越多。P2P系统节点之间的资源高度共享，节点之间的信息搜索和交换往往需要第三方节点进行信息中转，这为信息窃取和信息窜改类型的网络攻击带来了便利。为了提高P2P应用的可用性，提出了在P2P环境下一种新的以可信度为标准的服务路由系统的模型，阐述了模型的设计思想，并详细介绍了其实现机制。对仿真系统进行了性能测试，并对测试结果进行了分析。该模型对于信息窜改、信息窃听及路由功能失效等类型的恶意攻击有较好的抑制作用。

Service Routing System Design Based on Trust in P2P Environment

With the development of the network technology,more and more applications of distributed P2P system emerge.The peers in P2P environment always shared a lot of resources.The third peer is usually needed in order to realize the information exchanges and search among peers.This may give chances to attacks of information stealing and modification.In order to improve usability of P2P applications,we introduce a new service routing system based on a trust model in P2P environment.This paper proposes a novel service routing model and discusses design principles and further system implementation in detail.Simulation system's performance is tested and test results are analyzed.This service routing model can help to prevent several attacks of information stealing and modification in some ways.