1. Sidi Mohamed Ben Abdellah University,High Normal School,Department of Mathematics and Computer Science, IPI Laboratory,Fez,Morocco
2. Mohammed First University,Polydisciplinary Faculty,Computer Science Department, MASI Laboratory,Nador,Morocco
3. Mohammed First University,Higher School of Technology, MASI Laboratory,Nador,Morocco
4. Mohamed V University,ENSIAS,Rabat,Morocco