中文摘要：

Ding Xuyang is currently a Ph. D. candidate in the School of Computer Science and Engineering, University of Electronic Science and Technology of China. His research interests are information security, wireless communication network. E-mail： dingxuyang@tom.com Fan Mingyu received her Ph.D. degree in Southwest Jiaotong University of China, in 1996. Currently she is a professor of computer science at University of Electronic Science and Technology of China. Her research interests are focused on computer networks, information security. Lu Xiaojun received his Ph.D. degree in Queen＇s University of Belfast, UK, in 2005. He has wide research interests, including cryptograph chips, software engineering and numerical simulation. Zhu Dayong received his Ph.D. degree in Chengdu Inst. of Computer Applications, Chinese Academy of Sciences, in 2003. His research interests are in modeling communication networks, their protocols, services and interconnection architectures. Wang Jiahao is currently a Ph.D. candidate in the School of Computer Science and Engineering, University of Electronic Science and Technology of China. His research interests are the sensor network, information security.