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Traditional control mechanisms include irrational role allocation, long time of encryption and decryption, and users can not access safely. According to the role encryption principle, a role encryption hybrid cloud storage framework is built. In order to better access each module in the subsystem, we analyze the user credibility and behavior monitoring, in order to achieve the dynamic monitoring access control mechanism. The experimental verification shows that the mechanism can effectively allocate the role and control the encryption, decryption and user access accurately.