Brahim Lejdel is currently a Full Professor in the Faculty of Exact Sciences, University of EL-Oued (Algeria). He has held a Magister Degree in Computer Science from University of Ouargla since 2009. He held his PhD in computer science in 2015. He is the author of more than 120 published articles in refereed journals and International Conferences. He publishes six books in his research domain. He is the chairman of many international conferences. He works as an invited editor, reviewer, and others in many journals and conferences. He is the supervisor of many students in computer science in License, master and doctorate.