SONG Ningning, received his Ph.D. degrees t~om University of Science and Technology Beijing, China in 2014, respectively, in Communication and Information System. He is currently a postdoctor in the School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China, University of Science and Technology Beijing, China. His research interests include cloud computing security, big data and Energy efficiency analysis.*The corresponding author. Email: 6221294@163.com SUN Yah, received Bachelor's degree in Department of Computer and Communication Engineering from Tianjin University of Technology, China in 2012. At present, he is pursuing his Ph.D. degree in Department of Communication Engineering, School of Computer and Communication Engineering, University of Science and Technology Beijing. His research interests include resource allocation of cloud computing, game theory, network redundancy elimination.