Research Of Trust Mechanism In P2P Electronic Commerce

With the popularization of the network, P2P was used in many fields. Put E-commerce into the P2P network, can avoid problem like one node malfunction , save cost, enhanced the convenience and flexibility of E-commerce, on the other hand that aggravate the risk and security threatening of business activity. So it was necessary to adopt some measures to reduce the venture of customer, and consequently accelerated the development of E-commerce.Traditionalcentral trust mechanism was unfit to the demand of P2P system, so as to establish distributed trust mechanism to enhance the dependability of P2P system.Trust model was the most important component in trust mechanism; it dedicated to the trusted member or trusted data, and ensured members of using resource of more rationally through restricting the improper actions. The trust model can not only encourage proper actions, but also promote P2P system to well development.The existing trust model was so complicated and expended many network resources. A more simple local trust model, classified member group-based trust model (CMGTM), was brought forward. it partitioned the whole network into three sets good set,bad set andΦset, put the information of the nodes associated into the local record table, disposed the nodes according to there class when querying and calculating the trust degree, thought over the information offered by the nodes which belonged to good set, made the information more credible, excluded and islanded the nodes which belonged to bad set; Before the business, node can calculate the final trust degree by the information from local record and network enquiry, after the business, node calculated local trust degree and update the record by the information which user estimated, as reference for local node and the other nodes in the network, relative to the traditional trust model, it reduced expend of network resources, advanced the credit to the nodes who offered information, improved usability of network. Finally, we a prototype of P2P E-commerce system based JXTA used CMGTM.