He received his Ph.D. degree in Electrical Engineering from the Arizona State University in 2013, his B.E. degree in Communication Engineering and the M.E. degree in Communication and Information Systems both from Huazhong University of Science and Technology, China, in 2001 and 2005, respectively. From 2005 to 2007, he was a software engineer at UTStarcom, Shenzhen. His research interests are the security and privacy issues in wireless/mobile networks and systems, wireless/mobile health, smart grids, social networks, and cloud computing.