Jungsuk Song received his B.S. and M.S. degrees in Information and Telecommunication Eng. from Korea Aerospace University, Korea in 2003 and 2005, respectively. He received his Ph.D. degree in the Graduate School of Informatics, Kyoto University, Japan in 2009. He is currently an expert researcher at National Institute of Information and Communications Technology (NICT), Japan. His research interests include network security, data mining, machine learning, security issues on IPv6, spam analysis, and cryptography theory. He is a member of IEEE and IEICE.