Trust Model Analysis And System Implementation About MP2P Network

With the rapid development of mobile communication technology,traditional P2 P network technologies are difficult to adapt to Mobile P2P(MP2P)networks.MP2 P networks have some unique features that make their trust issues more prominent.According to the deficiency of the existing MP2 P trust model,a trust model is proposed based on the dynamic security trust model.Then,a trust management system is designed and implemented.Finally,simulation comparison experiments are conducted to further illustrate the reasonable feasibility of the model.Firstly,based on the characteristics of MP2 P network,this paper analyzes the existing deficiencies of some typical trust models and proposes a dynamic rank judgement based on trust model for MP2 P Networks(DRJTM_MP2P).The model adopts a hybrid network topology and periodically considers both global contribution and time experience.It dynamically assigns different ranks to network nodes and assigns different weights according to the rank.As the node rank rises,the weight it occupies will increase.This paper refers to the degree of stability of the trust value measured by the variation coefficient of human sociology to make the weight distribution more reasonable.In order to solve the resource query delay problem caused by the failure of the super node,the redundancy scheme of the alternative super node selection strategy is given in the model,and the super node replacement efficiency is improved.After analyzing the reliability of DRJTM_MP2P,the rationality of the model is explained.Then,based on the DRJTM_MP2P trust model,this thesis designs a node trust management system for MP2 P networks.In order to ensure that nodes can secure instant communication and resource acquisition in mobile networks,the system is mainly composed of trust and hierarchical processing,authentication,encryption and decryption processing,and resource acquisition.Finally,using the file sharing as a background,the PeerSim simulation platform is used to compare and simulate the system.Experiments show that under the condition of small overhead,the system can effectively adapt to the dynamic characteristics of mobile networks,ensure the transactions between nodes,improve the transaction success rate,and at the same time can effectively suppress the attack behavior of free rider nodes and destructive nodes.To solve the problem of trust in MP2 P network environment.