Abstract: With the increasing development and wide application of cloud computing, the issue of security in cloud computing environment has attracted more attentions in technology information. Initially, this article involves in analyzing the status of security in cloud computing environment. It establishes the framework for cloud computing environment security under basic requirements through the deep research of this subject. In addition, it clearly identifies the specifications and methods required by this framework. It focuses on considering the risk analysis, the actual environmental safety requirements investigation, cloud security event analysis and related research achievements. From above, it takes effective measures when the protection objects faces risks in cloud computing framework and then draws the corresponding manipulated variables. Finally, according to marking model, it can measure and evaluate the security risks in cloud computing environment and the efficiency of security measures. This article could provide the relative reference for the relevant departments to develop cloud computing security standards and fulfill the evaluation of inspection and duty.

Key words: cloud computing, security, security check, risk assessment, index system