1. Center for Information Security Technologies (CIST) Korea University Anam-dong Seongbuk-gu Seoul 136–713 Korea
2. Samsung Electronics Co. Ltd. Maetan-dong, Yeongtong-gu Suwon-si 443–742 Gyeonggi-do Korea
3. Department of Computer and Telecommunications Engineering, College of Science and Technology Yonsei University Wonju Campus Maeji-ri, Heungeop-myeon Wonju-si 220–710 Gangwon-do Korea