Access Control Strategy Based On The Classification Model Of P2P Network

With the rapid development of Internet, the Peer-to-Peer (P2P) network technology develops rapidly now days. At present, the P2P network is under developing without a mature standard. With the distributed characteristic, P2P network lacks centralized control and its safety becomes a serious problem, especially in the shared resources. Moreover, the P2P system with open and anonymous character admits the entrance and departure of any peer, some evil peers could do harm to the system and enhance the unsafely of P2P system. The traditional central trust mechanism will not meet the demand of the P2P system anymore, so it is necessary to establish a distributed trust mechanism to enhance the dependability of the P2P system.Trust model is the most important parts in the trust mechanism, this paper puts forward a comparatively simple distribution model after analyzing the existing trust model. The model evaluates the credit by the method of estimation based on the credit mechanism of the realistic word. Though the resources provided and the transaction information of the node to decide the classification of the node, chooses the way which the trust news obtains through the node's category, reduces the capacity of information in the P2P network, enhances the validity of the trust information acquisition . The credit are divided into direct credit information and recommended credit information after the collecting and analyzing of the information related to the peers. The reputation value of trade node is calculated as the proof whether the trade will go on after the correction of the related information by the different evaluation ability. As verified, this trust mode is feasible and practical, effectively boosting the general capability of the P2P network. Also, the model needs further study and improvement in the future.