Dr. Ilsun You received his M.S. and Ph.D. degrees in Computer Science from Dankook University, Seoul, Korea in 1997 and 2002, respectively. Also. he obtained his second Ph.D. degree from Kyushu University, Japan in 2012. From 1997 to 2004, he worked for the THINmultimedia Inc., Internet Security Co., Ltd. and Hanjo Engineering Co., Ltd. as a Research Engineer. In 2005, he joined Korean Bible University, South Korea as a full time lecturer, and he is now workding as an associate professor. Dr. You has served or is currently serving as a main organizer of international conferences and workshops such as IMIS(International Conference on Innovative Mobile and Internet Services in Ubiquitous Computing), MobiWorld (International Workshop on Mobility Management in the Networks of the Future World), MIST (International Workshop on Managing Insider Security Threats), SeCIHD (International Workshop on Security and Cognitive Informatics for Homeland Defense), AsiaARES and so forth. He is in the editorial board for International Journal of Ad Hoc and Ubiquitous Computing (IJAHUC), Computing and Informatics (CAI), Journal of High Speed Networks (JHSN), and International Journal of Space-Based and Situated Computing (IJSSC). Also, he has served as a guest editor of several journals such as Information Sciences, CAMWA, MCM, CAI, MIS, AutoSoft and WCMC. His main research interests include?internet security, authentication, access control, formal security analysis, MIPv6 and ubiquitous computing.