A Trust Model Which Based On The Method Of Grey Correlation

Cloud computing is one of the hot topics in the current social studies, a lot of well-known domestic and foreign enterprises have invested in the study of cloud computing, the service idea of convenient dynamic scalability is the direction of the social networks’ confidence research. But some companies have encountered a lot of problems when they launched cloud computing services. E.g. The cost-effective of cloud computing is high, but we must ensure the service’s safe and reliable at first. With the development of the cloud computing applications, the network security issues are more prominent. Depend on service provider or the consciousness of the node to constrain its behavior is not reliable. So it’s very necessary to establish an effective confidence-building mechanism for ensuring the security of the cloud platform.The paper introduced the knowledge of the cloud computing, described the cloud computing security issues, and put forward the idea of using the trust mechanism to the network security management. By the analysis of existing trust model, the author put forward a trust model which based on grey correlation according to the characteristics of cloud computing, in order to constrain the behavior of the nodes in the cloud platform, to protect the various facilities of the cloud platform.The content of the thesis mainly includes the following aspects:Frist of all, the author introduced the knowledge of the cloud computing platform and distribution network, analysis the security needs and the threats of the network environment, and discussed several typical trust models.the author introduced the knowledge of the cloud computing, the characteristics of trust, the knowledge of fuzzy mathematics theory and gray system theory.Secondly, the author proposed the trust management model which based on gray correlation degree, gave the specific algorithm which distributes the users’rights to determine the user’s trust level in the platform. The changes of the user’s trust level will bring the dynamic changes of roles and permissions, in order to manage and guide the user’s behavior, to protect the security of cloud computing system.Thirdly, At last, the author made the simulation experiment to prove the effectiveness of this model.The implementation results show that the proposed trust model is valid, and a brief analysis of the security of the simulation results.