Efficient audio cryptosystem based on chaotic maps and double random phase encoding. - Elsayed M. Elshamy; El-Sayed M. El-Rabaie; Osama S. Faragallah; Osama A. Elshakankiry; Fathi E. Abd El-Samie; Hala S. El-sayed; Said Fathy El-Zoghdy (Int. J. Speech Technol., 2015)

Secure VoIP System Based on Biometric Voice Authentication and Nested Digital Cryptosystem using Chaotic Baker's map and Arnold's Cat Map Encryption. - Elsayed M. Elshamy; Hamdy M. Kelash; Aziza I. Hussein; Hesham F. A. Hamed; Mahmoud A. Abdelghany (ICCA, 2017)

Voice over internet protocol voicemail security system using two factor authentication and biometric prints with new efficient hybrid cryptosystem. - Elsayed M. Elshamy; Aziza I. Hussein; Hesham F. A. Hamed; Mahmoud A. Abdelghany; Hamdy M. Kelash (Multim. Tools Appl., 2021)