中文摘要：

E-mail：（xiaomj}@ustc．edu．cn； Ming-Jun Xiao was born in 1976. He received the Ph.D. degree in computer science from University of Science and Technology of China in 2004. He is currently a lecturer at School of Computer Science and Technology, University of Science and Technology of China, and a member of China Computer Federation. His major research interestsare wireless network and information security. E-mail：（lshuang}@ustc．edu．cn； Liu-Sheng Huang was born in 1957. He received the M.S. degree in computer science from University of Science and Technology of China in 1988. He is currently a professor and Ph.D. supervisor of the Department of Computer Science and Technology at University of Science and Technol- ogy of China. He is also a senior member of China Computer Federai tion. His research interests are in the areas of wireless sensor network, distributed computing and information security. E-mail：（qunfeng}@ustc．edu．cn； Qun-Feng Dong was born in 1977. He received his Ph.D. degree in computer science from the University of Wisconsin, Madison. Prior to that, he received his B.S. and M.S. degrees, both in computer science, from the University of Science and Technology of China and the University of Massachusetts, Amherst, respectively. Currently, he is a professor with the School of Computer Science and Technology at the University of Science and Technology of China. His research interests include wireless networks, sensor networks, Internet, packet processing and information security. E-mail：（anliu}@ustc．edu．cn； An Liu received the Ph.D. degree in computer science from University of Science and Technology of China. He is currently a lecturer at College of Computer Science and Technology, University of Science and Technology of China. His research interests are in the areas of service-oriented computing and distributed computing. zgyang@mail．ustc．edu．cn Zhen-Guo Yang was born in 1984. He is a Ph.D. degree candidate in Department of Computer Science and Technol