1. Department of Computer Science, Nottingham Trent University, Nottingham, U.K.
2. School of Cyber Science and Engineering, Wuhan University, Wuhan, China
3. Department of Computer Science, Faculty of Information Technology, Zarqa University, Zarqa, Jordan
4. College of Computer Science and Technology, Harbin Engineering University, Harbin, China
5. JMVL Ltd., London, U.K.