Research Of Trust Model Of Mobile P2P Network Environment

As well as the rapid development of 3G/4G communication technology and the constant innovation of mobile Internet technology,the application of P2P technology in the field of mobile networks has resulted in a climax,but also faced the trust issues like traditional P2P networks,even as some of the unique features to mobile P2P network,so that the problem in a mobile environment becomes more prominent.Build trust model for trust management of nodes in P2P networks is a mature solution in the traditional P2P network.However,due to the characteristics of Mobile P2P network,the very mature trust model which is used in traditional P2P network can not be directly applied to the mobile environment.Therefore,the focus of this paper is to study the P2P network considering some inherent properties and the unique characteristics of the mobile environment,and put forward the trust management model in mobile P2P environment.Combining P2P technology and features of mobile environments,this paper analyzes the existing problems of some typical trust models,and puts forward the improved trust model of mobile P2P environment.The model with hybrid P2P network topology structure,selecting large server as supernode in the underlying cable network,and supernode is responsible for computing and maintaining it is connected to the common node identity information,information resources,trading records and trust information.The model simplifies the calculation of the node's trust value,and secondly,the recognition and suppression of the three types of malicious nodes exist in the network,finally the highly dynamic Mobile P2P network,credit transfer mechanism is proposed.In this paper,file sharing as the background,on the PeerSim simulation platform,were three aspects of the simulation,the first is system overhead compared,with the expanding of network size,this paper model the system overhead increases slowly and is reduced to a certain extent;followed by the validation of the three types of malicious nodes,along with the continuous trading,node transaction success rate tends to be stable;Finally compared the fixed proportion of malicious nodes under the condition of different models of successful transactions,this paper models the transaction success rate basically stable at more than 85%.Through simulation experiments showed that the model in terms of system overhead,the model safety and transaction success rates have shown a good state,can be resolved the trust problem in mobile P2P nerwork environment in a large extent.