1. Faculty of Computer Science and Information Technology, Universitas Sumatera Utara, Indonesia
2. School of Information Technology, UNITAR International University, Malaysia
3. Department of Information Technology, Universitas Muhammadiyah Sumatera Utara, Medan, Indonesia
4. College of Computer Science and Information Technology, Albaha University, Saudi Arabia
5. Department of Information Technology, Faculty of Computer Science and Information Technology, Universitas Sumatera Utara, Indonesia