Rui Zhang received his B.E. degree in Communication Engineering and his M.E. degree in Communication and Information Systems both from Huazhong University of Science and Technology, China, in 2001 and 2005, respectively, and his Ph.D. degree in Electrical Engineering from the Arizona State University in 2013. He worked as a software engineer at UTStarcom, China, from 2005 to 2007. He joined the Department of Electrical Engineering at University of Hawaii as an Assistant Professor in July 2013. His research interests are security and privacy in wireless/mobile networks and systems, wireless/ mobile health, smart grids, social networks, and cloud computing. He has published 23 papers in peer-reviewed journals and conferences with over 400 citations, which cover the areas such as authentication, secure computing, access control, secure data outsourcing, jamming attack defense, anonymous communication, and trac analysis. His current research project focuses on secure spectrum management in cognitive radio networks.