HUANG Hoiping, Associate Professor with College of Computer, Nanjing University of Posts and Telecommunications, China. He received his M.S. degree in computer software and theory from College of Computer, Nanjing University of Posts and Telecommunications, China and his Ph.D. degree in computer application technology from School of Computer Science and Technology, Soochow University, China in 2005 and 2009 respectively. His current research interests include wireless sensor networks, information security, mobile agent, and the Internet of things. Email: hhp@njupt.edu.cn HUANG Shichao, postgraduate with College of Computer, Nanjing University of Posts and Telecommunications, China. He received his B.S. degree in electronic and information engineering from College of Electrical and Information Engineering, Hunan Institute of Engineering, China in 2011. His current research interests include information hiding, wireless sensor networks, and the Internet of things. Email: huangshichao907 @163.com CHEN Jiutian, postgraduate with College of Com- puter, Nanjing University of Posts and Telecommunications, China. He received his B.S. degree in software engineering from College of Computer, Nanjing University of Posts and Telecommunications, China in 2012. His current research include information hiding, wireless sensor networks, and the Internet of things. Emaih chen9t@gmail.com WANG Ruchuan, Professor and Ph.D. Supervisor with College of Computer, Nanjing University of Posts and Telecommunications, China. He received his B.S. degree in computational mathematics from the PLA Information Engineering University, China in 1968. His current research include intelligent agent, information security, wireless networking and distributed computing. Email: wangrc@njupt.edu.cn