Abstract: With the rapid development of network applications，the impact of exposing the identity of communications and commercial sensitive information is becoming more and more serious，which results in much more requirements about anonymous.CliqueNet is a peer-to-peer，self-organizing，and scalable anonymous communication protocol.However，CliqnuNet does not resist topology attacks.In this paper，the accessing rules and add RSA public-key mechanism is improved，thus the accessing protocol takes the decision on which clique to join out of the hands of the joining node and prohibit topology attacks efficiently.Then threshold based trust mechanism is introduced，which reduces the computing complexity of RSA public-key encryption，ensures the node accessing network efficiency and improves the CliqueNet security performance.

Key words: CliqueNet, topology attack, RSA public-key, trust mechanism, threshold

摘要： 随着网络应用的迅速发展，因暴露通信双方的身份及商业领域的敏感信息对人们造成的影响日趋严重，从而导致人们对匿名的要求越来越强。CliqueNet是一个自组织的P2P匿名协议，具有强匿名性、良好的可扩展性。然而CliqueNet网络无法抵抗拓扑攻击。在文中对其结点加入的规则进行了改进，添加了基于RSA的公钥机制，使结点以随机的形式加入clique网络，增加了CliqueNet抗拓扑攻击的能力；同时引入了基于阈值控制的信任体制，降低了RSA公钥加密机制的计算复杂度，保证结点加入网络效率并提高了CliqueNet网络的安全性能。

关键词: CliqueNet协议, 拓扑攻击, RSA公钥, 信任机制, 阈值