Abstract:

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.

Key words: P2P networks, reputation model, attack, global trust, information security