The Research Of Trust Model In P2P Electronic Commerce

With the development of network, P2P e-commerce grows rapidly as a new mode of e-commerce. While e-commerce changes the style of human business, the security problem raises to be the focus people concern. As a supplement to traditional security technology, trust management is a new research domain which gathers knowledge representation, behavior evaluation, information management, logic reasoning and decision support, and it is a key technology to solve security problem in P2P e-commerce. On the foundation of concluding recent trust result, this article makes a deep research on trust model applied in P2P e-commerce, the main work is as follows:(1)Aimed at the disadvantage of traditional trust model, trust evaluation model based on trade amount is presented. It puts forward an updating formula of direct trust value, solves the evaluation of trust value in different trade scale through introducing trade amount and trust worthiness updating parameter, which prevents malicious notes waggling. The presentation of dynamic threshold setting mechanism avoids malicious notes' second attack and decreases the risk of trade while it ensures the opportunity to trade for new notes.(2)Due to recent trust models' harsh grain, an integration trust evaluation model based on grey theory and multi-QoS attribute is put forward. It presents a trust mechanism based on multi-QoS attribute which is on the foundation of trust model based on trust trade amount, makes traditional trust model fine-grained and solves the trust worthiness quantization problem that the service note is located in different service domain and QoS attribute. An integration trust evaluation algorithm based on grey theory is given to realize integration evaluation of notes which possesses multi-QoS attribute.(3)A trust evaluation model based on grey prediction, which applies interrelated theories of grey prediction to trust evaluation model, is given to offer a new evaluation method of notes. The model takes advantage of grey theory which solves uncertainty problem of short data and message efficiently, evaluates trust value of notes by analyzing notes' historical trust value and digging variety rule.The article puts forward three different kinds of solution through three different trust model aimed at the problem of recent trust model. Integrating the three models in practice organically and blending them into P2P e-commerce provide safety guarantee for e-commerce.