The Research Of Hybrid P2P Network And Its Trust Model

The use of P2P network is more extensive and P2P network has already gone through the three generation development. The first generation of P2P network, namely a centralized P2P network, needs a central server that bases on the client index directory server. The central server manages and organizes all P2P client node, all nodes of the information is registered on it. The second generation of P2P is fully distributed network, which is one kind of decentralized P2P network. Such network can be divided into structured P2P network and unstructured P2P network. Structured P2P network uses DHT routing technology organization. Unstructured P2P network makes use of the flooding form to research resources. The third generation of P2P network is a hybrid P2P network. This kind of P2P network divides all nodes into super nodes and ordinary nodes. Super nodes are connected in the form of fully distributed architecture. Ordinary nodes make use of super nodes as the central server, thus the third generation of P2P network combines the first generation P2P network’s advantage of inquiring and the second generation P2P network’s advantage of decentralizing. The hybrid P2P network is now very widely used, however there is no effective solution to network security problems. The existing trust models are universal, not targeted.This paper proposes a new hybrid P2P network CNWP. The most critical node of hybrid P2P network is super node, thus the choice of super node is the key to hybrid P2P network. CNWP network using analytic hierarchy process to select the super node to achieve the best performance of targeted. According to the theory of small world, CNWP network based on RTT (round-trip delay of the transmission network nodes) to achieve the super nodes clustered according to district. CNWP network routing mechanism is based on the improved algorithm of Chord and divides Chord ring into inner ring and outer ring. The inner ring is query routing of Chord among these super nodes and the out ring is super node forwards the common node information, which achieve the perfect concordance. This paper then proposes for the CNWP network trust model. According to the shortcomings of the existing trust model and special advantages of CNWP network, this paper proposed a new trust model. Based on the trust model of theoretical knowledge, this paper abstracts a trust framework "BaseRframe". Specific trust model is the framework for the concrete realization of trust. Basing on the research on storage of value, this paper proposes the trust value for CNWP network data structure. This paper is divided into direct and indirect trust value. Integrated direct value and indirect trust value can calculate to the overall trust value worth. The final research bases on the value of CNWP search algorithm to make full use of CNWP network’s advantage of finding efficiency.