匿名通信系统中时间攻击模型研究

Study of Timing Attack in Anonymous Communication System

时间攻击是指对手研究信息穿过系统的时间来找出信息发送者和接收者之间的相关性,对支持交互式的低延时匿名通信系统形成一种巨大威胁。论文提出了一种基于重路由技术的匿名通信系统和针对该系统的时间攻击模型,理论分析和计算数据表明这种时间攻击方式可以有效地破坏匿名通信系统中信息发送者和接收者之间的连接性,但这种时间攻击的成功率受到信息到达率和节点延迟时间以及重路由路长等因素的影响。

Timing attack is that an attacker studies the timing of messages moving through the system to find correlations of messages sender and receiver，It is a significant challenge for anonymous communication system that provides interactive,low-latency applications.This paper，proposes a general anonymous communication model based on rerouting,and a timing attack model also has been presented according to this model.Through analysis and simulations,this paper also shows that the kind of attacking method can efficiently destroy the anonymity links of the message sender/receiver in anonymous communication system,it also shows the effect of this timing attack is influenced by the rate of message arrivals ,the delay times and the lengths of rerouting route etc。