源路由匿名通信系统中主动路径探测机制研究

Research of Active Path Detection in Anonymous Communication System Based on Source Routing

在源路由匿名通信系统中,通信发送者发起建立一条由多个成员组成的重路由路径,并采用嵌套加密技术加密传输数据,以保证通信关系匿名。然而,通过主动破坏重路由路径并迫使其多次重构,合谋成员能采用前驱攻击的方法,推断出通信发送者的真实身份,破坏系统的匿名性。本文提出主动路径探测机制,由通信发送者发送嵌套加密Ping 报文以探测重路由路径的状态,根据用户返回的签名响应报文确定路径上的故障点,以确定系统中的主动合谋成员,从而提高匿名通信的安全性。

To achieve the relationship anonymity,the sender of communication establishes a rerouting path consisted of multiple participants in the Anonymous Communication System based on Source Routing(ACSSR),and nested-en- crypt the message.By destroying the rerouting path,however,collaborators in system can force the rerouting path to reset multi-time,thus perform predecessor attack to determine the sender of communication,and compromise the anonymity.In this paper,a strategy based on active path detection mechanism is proposed,which ping every interme- diator of the rerouting path by nested-encryption message.Active collaborators can be located precisely according to the response message after the collaborators destroy the rerouting path muhi-times.Thus,the security and reliability of system could be enhanced effectively.