中文摘要：

Jun-Zuo Lai received the B.S and M.S. degrees in computer science and technology from Jingdezhen Ce- ramic Institute in 2002 and 2005, re- spectively. He is currently a Ph.D. candidate in the Shanghai Jiao Tong University, Shanghai, China. His research interests include cryptography and information security. Wen-Tao Zhu received his B.S. and Ph.D. degrees both from De- partment of Electronic Engineering and Information Science, University of Science and Technology of China. He has since 2004 been with State Key Laboratory of Information Se- curity, Graduate University of Chi- nese Academy of Sciences, and is cur- rently an associate research profes-sor. His research interests include computer networking and information security. He is a member of IEEE and is a senior member of the China Institute of Communications. Robert H. Deng received his Bachelor＇s degree from National Uni- versity of Defense Technology, China, M.Sc. and Ph.D. degrees from the Illinois Institute of Technology, USA. He has been with the Singapore Man- agement University since 2004, and is currently professor, associate dean for Faculty ＆ Research, School of In- formation Svstems. Prior to this. he was principal scientist and manager of Infocomm Security Department, Institute for Infocomm Research, Singapore. He has 26 patents and more than 200 technical publications in international conferences and journals in the areas of com- puter networks, network security and information security. He has served as general chair, program committee chair and program committee member of numerous international conferences. He is an associate editor of the IEEE Transactions on Information Forensics and Security, associate edi- tor of Security and Communication Networks Journal （John Wiley）, and member of Editorial Board of Journal of Computer Science and Technology （the Chinese Academy of Sci- ences）. He received the University Outstanding Researcher Award from the National University of Singapore in 1999 and the Lee Kuan Yew Fellow for Research