Improved P2P Resource Search Algorithm Based On Trust Model

Trust model is a relationship of trust establishment and management framework, which emphasizes the credibility of the data members and, through the application environment for misconduct in the notice and restrictions for the user to more rational use of resources to provide a guarantee. P2P trust model is currently in the field of P2P systems are mainly used to improve security and reliability, especially in identifying credible and trusted content of members is unique. In fact a large number of P2P interaction between network nodes, there are some nodes in routing performance reflects the information that you can trust model to be collected and summarized. Use the information to influence the routing, the routing of network reliability and improve the hit rate is quite useful.This article discusses the structure of building a robust network model, including the design of a high security, reliable convergence of the routing algorithm, logic and self-organizing P2P network trust model. This paper describes the most common types of structured network model, then the development of the current status of P2P network model is analyzed. Pastry network model described in detail the structure and routing algorithm, and the complexity of the routing algorithm for quantitative analysis, points out the advantages and disadvantages. Network self-organization model of the logical structure of the network is limited, since the organizational structure of the nodes should be spread as possible.This paper does not focus on the stability of P2P networks rely on trust model to build a good reputation mechanism to influence the choice of route, taking into account fluctuations against malicious nodes and the network. Interact with the node over all nodes of the node can evaluate the service capacity. This evaluation is not simply to determine the success of this route, and the ability to evaluate the routing node, the routing of the indentation distance and delay are the reference rate factors. The structure score stored in the evaluated node, encrypted, after a period of interaction, each node's routing capabilities have been objectively evaluated, this information will be adjacent to the next routing node reference.Finally, the task to implement a UDP-based reliable and stable P2P communication platform. Trust model will bring about convergence of routing and integrated routing algorithm, the new routing convergence criteria will have strong, hit rate and high security features. The P2P communication platform will be abstracted as data stream communications distribution, to support various types of basic data types and structure of the transmission, shielding the underlying details of the socket and the network layer, and use self-designed communication protocol will not be reliable become a reliable UDP protocol to avoid packet loss, duplication and network congestion, the experimental test has a good ability to penetrate NAT.