P2P网络中一种可信任的全局信誉模型

Trustworthy Global Reputation Model in Peer-to-Peer Networks

针对P2P网络中的节点安全性问题提出一种全局信誉模型,在历史交易的基础上动态更新各节点的服务信任值和请求信任值,讨论了信誉建立过程中的5种攻击对信誉模型的影响.仿真实验表明,该模型的信任值更新算法和防御机制具有健壮性,可保护网络中的诚实节点,迅速降低恶意节点的信任值,有效抑制恶意行为.

In terms of the nodes security issues in peer-to-peer networks,we present a global reputation model that dynamically updates the service trust value and requests trust value according to the transaction history.We also discuss the impact of five types of attacks on the reputation model in establishing the secure reputation model.Simulation results show that the trust updating algorithms and defense mechanisms of this model provide a high degree of robustness.Meanwhile,the reputation model can effectively protect honest nodes,reduce the trust value of malicious nodes,and restrain malicious behaviors.