Corresponding Author: Bilin Shao, received the B.S. degree at School of Management, Xi’an University of Architecture and Technology, Shaanxi, China. He is professor at XAUAT.He is a member of China Computer Federation(CCF). His research includes Information Security, Information management technology and cloud computing security.Email: sblin0462@sina.com;Genqing Bian, is currently a Ph.D. candidate at School of Management, Xi’an University of Architecture and Technology, Shaanxi, China. He is a member of China Computer Federation(CCF) and Association for Computing Machinery(ACM). He is a associate professor at XAUAT. His research includes Information Security, Cloud computing security, Massive Information Storage technology. *The corresponding author. Email: bgq_00@163.com.;Rirui Quan, is currently a M.S. degree at School of Information and Control Engineering, Xi’an University of Architecture and Technology, Shaanxi, China. His research interests include cloud computing security, privacy protection and data copyright protection. Email:quanxirui@126.com;Zhixian Wang, is currently a professor at School of Information Engineering,Yulin University, Shaanxi, China. His research includes Computer and Internet Security. Email:wzx8001@189.cn.