关键词: 匿名通信, 持续Mix, 统计暴露攻击, 填充包策略

Abstract: Disclosure attack is a typical attack method to destroy anonymity.According to the principle of statistical disclosure attack，a new packets number-based disclosure attack algorithm to continuous Mix is proposed in this paper.The influence of target receiver number, total sender number and receiver number in the system and the delay of Mix to the attack capacity is simulated and evaluated.Based on that，it presents that in the anonymous system based on continuous Mix，padding packets sending for sender concealing and background disturbance could withstand the attack.

Key words: anonymous communication, continuous Mix, statistical disclosure attack, padding packet