Research On Trust Model And Its Application In E-commerce For Cloud Computing

Cloud computing draws more and more attention from academies and industries,since it exemplifies favorable properties such as massive scale, highly reliable services, on-demand self-service, scalable and flexible deployment, etc. It not only provides service to the customers with large amounts of cheap computers and portable public basic resources, but also gives its ideal supports to deal with and manage huge amounts of data. With the promotion and development of cloud computing, it faces the severe security challenges. The traditional information security technology would continue to function in the field of cloud computing security. But,solving trust issues between entities in cloud computing is the key to implement cloud security. To deal with trust evaluation problem comprehensively through a variety of social and technical means is one of the important issues in the cloud security trust management.In order to establish trust relationship among the users and the service providers in cloud computing environment, and solve the trust issue in the emerging E-commerce based on cloud computing, making reference to existing trust evaluation techniques,this article studies and puts forward a trust evaluation and negotiation method to construct trust relationships between users and providers.The highlights of this dissertation are as follows:1) The model set up a third party cloud audit agency, who forecasts the behavior trust of the cloud service providers using Bayesian network. Then it evaluates the trust degree of cloud service providers based on their Service Level Agreement and the users’ feedback to help users choose the service that they trust accordingly.2) The audit agency monitors the users and the service providers using the game mechanism. The current behaviors and historical behaviors of the users and the cloud service providers are taken into consideration to estimate abnormal behaviors. Then the audit agency controls the monitoring probability for the users and the service providers on the basis of their trust level.3) This paper proposed a new cheat-proofing E-commerce trust model based on cloud computing. The trust evaluation method based on Cloud Model, objectively reflects the randomness, fuzziness and unpredictability of trust concepts. As cloudmodel is one for transformation between qualitative and quantitative knowledge.4)The trust model evaluated the E-commerce enterprise under multi-trust-attribute conditions, including privacy protection, information service,transaction service, logistics service. In order to effectively prevent credit speculation and deception behaviors, we presented the adaptable method of the time-window on the basis of the combination of evaluation quantity and time attenuation function.