匿名系统中统计分析攻击及防御策略研究  

Study on Statistical Analysis Attacks and Countermeasures in Anonymity Systems

作　　者：徐红云[1] 江丽[1] 彭曙光[1] 张涛[1] 

机构地区：[1]湖南大学计算机与通信学院

出　　处：《湖南大学学报（自然科学版）》2007年第7期73-77,共5页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金项目(60403032);湖南省科技厅项目(20063342467)

摘　　要：研究了匿名系统中固定重路由路径发送策略和变化重路由路径发送策略的安全漏洞,提出了相应攻击模型及攻击算法;采用概率分析的方法分析了攻击模型的有效性.为了防御以上攻击,提出了动态固定重路由路径策略,分析结果表明,采用该策略发送信息的发送者可以获得较高的匿名度.This paper focused on the effects of the fixed-rerouting path scheme and the variable-rerouting path scheme upon the anonymity degree in anonymity system based on rerouting. The probability method was adopted to prove that senders sending packets by either fixed-rerouting path or variable-rerouting path were vulnerable to certain attacks, thus degrading the anonymity degree of the sender. The dynamic fixed-rerouting path scheme was presented to resist the attacks efficiently, which were aimed at both the fixed-rerouting path scheme and the variable-rerouting path scheme, thus improving the anonymity degree of the sender. Theoretical analyses have shown that anonymity system adopting the dynamic fixed-rerouting path scheme provides a higher anonymity degree than anonymity system adopting either the fixed-rerouting path scheme or the variable-rerouting path scheme.

关 键 词：数据隐私 匿名系统 匿名度 动态固定重路由 

分 类 号：TP393.08[自动化与计算机技术—计算机应用技术]