摘要
P2P分布式系统特别容易遭受Sybil攻击,即一个不良用户伪造多个不存在的虚假用户,与网络中普通用户进行交互,进而达到控制网络的目的。防御模型基于社会化网络的信任概念,在SybilGuard基础上提出了路由增加信任权重的方法,用以降低节点与虚假用户交易的概率,实验显示,诚实节点间的交易成功率及节点停留在安全区域内的概率得到提高,增强了系统健壮性。
Decentralized distributed systems, such as p2p systems, are particularly vulnerable to Sybil attacks. In Sybil attack, a malicious user forges multiple fake identities known as Sybil identities, thus bringing most honest nodes in the network under their control. This paper proposes a defense mechanism based on fast-mixing social networks. In a real social network human-established trust-relationship is not equal to others. And Sybil Guard is enhanced with random router trust weight, which improves the probability of nodes communication within the honest domain.
出处
《信息安全与通信保密》
2012年第3期78-81,共4页
Information Security and Communications Privacy
