中文摘要：

结构化P2P覆盖网络提供一个自组织、可升级且容错性能好的合作P2P应用平台．借助于结构化覆盖网络的自组织和结构化特性，本文在结构化P2P覆盖网络基础上提出了一种不需要中心管理节点的重路由匿名通信机制．由于覆盖网络的开放性，本文分析了重路由路径长度的期望值与转发概率的关系以及重路由路径长度的期望值与覆盖网络中恶意成员数量的关系，并且分析了随着重路由路径重组轮数的增加，恶意节点将以更高的概率找到发起者．计算数据表明，采用递减转发概率将使得重路由路径长度的期望值显著降低，因而能保证良好的通信延时．

英文摘要：

Structured peer-to-peer overlay networks provide a self-organizing, scalable and fault tolerant substrate for cooperative peer-to-peer applications. Resorting to the character of self-organizing and structure in the structured Peer-to-Peer network, a rerouting-based anonymous communication scheme, which does not need an administrating node, is put forward in this paper. Because of the opening character of overlay network, the relation on the expected value of rerouting path and forward probability, and the relation on the expected value of rerouting path and the number of hostility participant are analyzed in this paper. Moreover, as the more rounds of rerouting path, the more probability hostility participant finds initiator. The calculation result demonstrates that descending forward probability makes the expected value of rerouting path decrease distinctly, therefore limits the communication delay.