The Study Of Authorization Mechanism Under Cloud Computing Environment

As cloud resource increased rapidly,how to guarantee the safety of information resources became our focus.This paper takes authorization mechanism of cloud resource management platform as the research object,study the relationship between authorization mechanism,cloud resources and access control.Ensuring the safety and effectiveness of cloud resource from overall.In this paper,to improve the safety and efficiency of cloud resources.We researched the authorization mechanism and RBAC model,improved the application in the process of authorization management algorithm.Moreover,we put forward a new model named RBAC3 that based on BPRBAC.This Model developed the traditional RBAC model in coarse-grained authorization,rights management,dynamic authorization,which is suitable for the cloud environment.Specific work is as follows:(1)First,this paper focus on the improvement of the traditional authorization mechanism of cloud resource management platform and CSP interaction.To be carefully,we study the realization of cloud resource management platform's authorization mechanism.Based on RSA asymmetric encryption algorithm and AES symmetric encryption algorithm of cloud resources management authorization mechanism.Combining two algorithm is applied to the authorization mechanism,to verify the legitimacy of cloud resources.(2)We improved the model which based on the control of role's access.Study of RBAC model,based on the analysis of user groups,semantic,time control and hierarchical control concept,constitute a new BPRBAC model.(3)To simulate the cloud environment,build BPRBAC model,we make the simulation experiments to simulate the combination of RSA encryption algorithm and AES encryption algorithm which validated validity and practicability of the BPRBAC model.