Fathy Saad Helail received the B.Sc. degree in Mathematics from the faculty of science in 1970. He received the M.Sc. degree in Mathematics from Al-Azhar University, Cairo, Egypt in 1983. He attained the Ph.D. degree in Mathematics from Seuz canal University in 1985. he was a visiting scholar at Tsujii Laboratory of Information system security, Department of electrical and electronic Engineering, Tokyo Institute of Technology, Japan. His Current job is a professor in mathematics department, in German University in Cairo, GUC. His current research interests includes design and implementations of encryption algorithms also cryptanalysis of cryptographic systems.