一种基于分组填充Mix策略的匿名通信机制

Anonymous communication mechanism based on group padding MIX approach

Mix机制为实现匿名通信技术提供了可行的解决方案,但攻击者仍可以在一定程度上通过流量分析来获取通信关系。为了进一步提高Mix机制对抗信息量分析攻击的能力,提出了分组填充的思想,并基于分组填充Mix策略给出了一种新型匿名通信机制。算法分析和仿真实验表明,与传统Mix机制相比,新的基于分组填充的Mix机制,能在有效抵御信息量分析攻击的同时,进一步降低网络的额外带宽开销。

The Mix mechanism has provided a feasible solution to the realization of anonymous communication. But to a certain degree, the attackers can still obtain the correspondence relations through traffic analysis. In order to further improve the ability of Mix mechanism to resist the traffic analysis of message volume, a kind of scheme named group padding was proposed, and based on which, a new anonymous correspondence mechanism was designed. Algorithm analysis and the simulation results show that, compared with the traditional Mix mechanism, the newly proposed Mix mechanism based on group padding scheme can resist traffic analysis of message volume effectively, and needs lower extra bandwidth at the same time.