Research On Trust Model Based On Transaction Characteristics And Feedback Evaluation Of P2P Networks

As a new e-commerce model，P2P system has been widely used in the economicdevelopment. Compared with traditional electronic commerce mode, P2P system has greatadvantages in the aspect of improve the eiffciency of commodity information network technology,more lfexible，eiffcient, and more human characteristics. Because of the anonymous, dynamicity,without a centralized structure features, P2P system provides Internet users with convenient, butalso brought a lot of new, security problem can never be ignored. In our daily life，in order toreduce the risk of trading activities, we usually choose creditworthiness high transaction object,that can gain higher transaction success rate. But due to the P2P nodes in a network ofindependent, voluntary information interaction is user behavior, it is diiffcult to establish trustbetween nodes through the traditional trust mechanism. Therefore，how to establish an effectivetrust mechanism to establish trust between P2P nodes，is a hotspot of research on the present P2Pelectronic commerce technology. In e-commerce mode，in order to reduce the risk of trading, it isnecessary to introduce the concept of trust management to achieve this goal. And trustmechanism of availability depends on the trust calculation method, the accuracy of the trustmechanism and its resistance to attack ability, etc. P2P environment, however, there are someproblems in many respects of the existing trust mechanism. How to select factors affecting trust isthe key to solve these problems.In this paper, according to the characteristics of the P2P e-commerce transactions conductedin-depth research, analyzes the cause of trust issues, elaborated the existing trust models. In orderto reflect the characteristics of the trading transaction authenticity and the credibility of nodeclearly, this paper made some improvements on the traditional trust model，and proposes a newcharacteristics and feedback evaluation in P2P system based on the transaction trust evaluationmechanism. The trust evaluation mechanism adopts the trading, trading environment satisfaction,transaction number, and other parameters to calculate the node trust value. In order to determinethe authenticity of feedback evaluation, attenuation function and transaction model is introducedinto the time impact parameters, feedback evaluation of the credibility of the calculation methodis given. The model introduces the factors influencing the trust,that can not only improve thelocal reputation and global reputation of the accurate calculation problems, but also strengthenthe trust mechanism of the ability against the attack.The simulation experimental results show that the evaluation mechanism can improvecalculation accuracy of local reputation and global reputation, and protect the malicious nodes，inhibit bad nodes effectively. Compared with some existing trust models，this model successfullyin the system on the question of exchange rate has greatly improved, more effective to build trust relationship between envoys points, reduce the probability of malicious transactions, can beapplied to P2P system effectively.