Hesham Arafat Ali, received a BSc in electrical engineering (electronics), and MSc and PhD in computer engineering and automatic control from the Faculty of Engineering, Mansoura University, in 1987,1991 and 1997, respectively. He was assistant professor at the University of Mansoura , Faculty of Computer Science In 1997 up 1999. From January 2000 up to September 2001, he was joined as post doctor to the Department of Computer Science, University of Connecticut, Storrs. From 2002 up to 2004 he was a vice dean for student affair the Faculty of Computer Science and Information, University of Mansoura. Since 2004 he has been an associate professor at the Computer Engineering Department, Faculty of Engineering, University of Mansoura. His interests are in the areas of network security, mobile agent, pattern recognition, databases, and performance analysis.