摘要： Tor匿名通信系统在全球范围内被广泛部署与使用，但其抵御溯源攻击的能力有待进一步建模分析。为精确衡量Tor用户在端到端溯源攻击下的安全性，综合Tor节点选择算法、用户使用模式、溯源攻击对手能力等要素，建立针对端到端溯源攻击对手的Tor安全性模型。经实验验证与分析结果表明，该模型可在统计意义下较精确计算对手捕获通信链路的概率及次数，以此衡量不同端到端溯源攻击对手对用户安全性的破坏程度。

关键词: 洋葱路由器, 端到端溯源攻击对手, 安全性模型, 节点选择算法, 用户安全性

Abstract: The Tor anonymous communication system is deployed and used globally,but its ability to resist source tracking attacks needs further modeling for analysis.In order to measure the security of Tor users under end-to-end source tracking attacks,a Tor security model is proposed,which considers multiple factors such as Tor node selection algorithm,user usage patterns and the ability of source tracking attack adversaries.The results of experimental verification and effectiveness analysis show that the proposed model can accurately calculate the probability and number of times that the attack adversaries capture the communication link.On this basis,it can measure the degree of damage to user security by different end-to-end source attack adversaries.

Key words: The onion router(Tor), end-to-end source tracking attack adversary, security model, node selection algorithm, user security

中图分类号: 

• TP393.08