1. Computer Science Department; Comsats Institute of Information Technology; Islamabad 45550 Pakistan
2. Faculty of Computer Science and Information Technology; University of Malaya; Kuala Lumpur 50603 Malaysia
3. School of Computer and Information Engineering; Sangji University; Wonju South Korea
4. Division of Convergence Technology Engineering; Chonbuk National University; Jeonbuk South Korea
5. Center of Excellence in Information Assurance (COEIA); King Saud University; Riyadh 12372 Saudi Arabia