Dr. Subramanian Karthikeyan is currently working as Assistant Professor in IT at College of Applied Sciences, Affiliated with Otago University, Newzealand, Run by Ministry of Higher Education, Sohar, Sultanate of Oman. He has completed his Ph.D. in Computer Science and Engineering from Alagappa University, India. Previously he was appointed as Senior Lecturer at Caledonian College of Engineering, Sultanate of Oman, (Affiliated to Glasgow Caledonian University, Scotland, UK, Assistant Professor, Associate Professor, Professor & Director at Karpagam University. He is editor in chief for International Journal of Mobile Communications, ACEEE Publications, India, International Journal of Computer Science and System Analysis, guest editor for Journal of Advances in Information Technology, and associate editor for International Journal of Computers and Applications, The International Journal of Technology, Knowledge and Society, International Journal of Network Security, and Control and Intelligence Systems and member of editor board/technical editor for number of journals. He is also serving as reviewer for number of journals. He is member of International Association of Computer Science and Information Technology (IACSIT), Singapore, Association of Computer, Electronics and Electrical Engineers (ACEEE), India, Computer Science Teachers Association (CSTA), New York, USA, and International Association of Engineers Computer Science/ Wireless Networks, Canada/ Spain. He also guided 15 M.Phil, and 13 PhD students. His main area of research interest focuses on Cryptography and Network Security, Security Protocols, Key Management and Encryption Techniques, Sensor Network Security. He has published 1 book chapter, 118 research articles in international journals and conferences.