Trust Model In P2P Network Security

P2P is peer-to-peer network,which is a newly popular computing model. Each peer node in P2P network is equal, which acts as both a client and a server. So this infrastructure is widely used in file-sharing, distributed computation, electrical business, etc. With a variety of widely used in P2P software, P2P network security issue has become a hot research point. Because of the P2P network's opening and anonymity, there are a variety of malicious attacks, and interests of normal users are severely destroyed. The establishment of a trust model in P2P network is an important aspect of the problem, which can ensure the safety of the system and reliability of transactions.Based on the research into the development and trust mechanism of P2P network, this thesis mainly improves the recommendation-based trust model. The history and recommendation-based trust model introduces many parameters to simulate the behaviors of peers in the networks, and estimate peers' behaviors in the future by computing peers through a comprehensive assessment. We distinguish the history of transaction and recommendation reputation, so that the results of the assessment closer to the real situation. Lastly, we compare the improved trust model with other recommendation-based model, the experimental results show that the model has good accuracy and security.