基于结构化P2P的可控匿名通信系统的研究

Research on Controllable Anonymous Communication System Based on Structured P2P

为防止匿名系统被滥用,在PGACS匿名通信系统模型的基础上,提出了分层架构的结构化P2P匿名通信系统(CACS-BSP)。通过采用基于数据包的加密机制实现匿名的可撤销,结合节点的信誉机制实现对节点自私行为的惩罚机制,使系统具有对匿名的可控性。理论分析表明本系统的匿名性等于Crowds和PGACS系统;经实验模拟发现,本系统在提供较高匿名性的同时,可使系统中自私节点和恶意节点数目的变化对系统的负载影响较小。

The anonymous communication technology based on P2P has been playing an important role for protecting the privacy of clients,and has received a rapid development recently. In order to prevent anonymous system from abusing. A new controllable anonymous communication system based on structured P2P（CACSBSP） is presented. Based on PGACS anonymous system modeI,CACSBSP with two layers architecture achieves revocable anonymity by exploiting package cryptography and penalty mechanism against selfish behaviors by logging nodes credits. These mechanisms let CACSBSP have the capability of controllable anonymous. Both theoretical analysis and simulation results show that the system could provide the same anonymity as Crowds and PGACS, and the number of selfish nodes and malicious nodes has little effect on the performance of the system.