1. Department of Computer Science, Guelma University, BP 401, 24000 Guelma, Algeria
2. Networks and Systems Laboratory, Badji Mokhtar University, BP 12, 23000 Annaba, Algeria
3. School of Computer Science and Informatics, Cyber Security Centre, De Montfort University, Leicester, UK
4. Research Institute for Future Media Computing, Shenzhen University, Shenzhen, China
5. Guangdong University of Petrochemical Technology, Guangdong, China
6. School of Engineering, University of Lincoln, Lincoln, UK