1. Faculty of Economics and Muamalat, Universiti Sains Islam Malaysia (USIM), Bandar Baru Nilai, 71800 Nilai, Negeri Sembilan, Malaysia
2. Faculty of Computer Science and Information Systems, Thamar University, Thamar, Yemen
3. Cyber Technology Institute (CTI), De Montfort University, Gateway House, Leicester LE1 9BH, UK
4. Department of Mathematical Sciences, College of Science, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
5. Faculty of Computing and Informatics, Universiti Malaysia Sabah (UMS), Labuan, Malaysia