Chaos-Based Confusion and Diffusion of Image Pixels Using Dynamic Substitution. - Abdullah Qayyum; Jawad Ahmad 001; Wadii Boulila; Saeed Rubaiee; Arshad Ali 003; Fawad Masood; Fawad Khan; William J. Buchanan (IEEE Access, 2020)

Joint Power and Reflecting Elements Optimization for Intelligent Reflecting Surface Assisted NOMA. - Irfan Azam; Abdullah Qayyum; Krisma Asmoro; Soo Young Shin (IWCMC, 2022)

A Lightweight Chaos-Based Medical Image Encryption Scheme Using Random Shuffling and XOR Operations. - Fawad Masood; Maha Driss; Wadii Boulila; Jawad Ahmad 001; Sadaqat ur Rehman; Sana Ullah Jan; Abdullah Qayyum; William J. Buchanan (Wirel. Pers. Commun., 2022)

On the performance of intelligent reflecting surfaces-assisted OAM with NOMA under imperfect SIC. - Abdullah Qayyum; Irfan Azam; Ahmed Al Amin; Soo Young Shin (Phys. Commun., 2024)

Gravitational Search Algorithm Swarm-Based UAV Reconnaissance for Multiple Targets Detection in Unknown Environment. - Ahmed Al Amin; Irfan Azam; Md. Masuduzzaman; Abdullah Qayyum; Muhammad Sajid Sarwar; Saud Khan; Soo Young Shin (IEEE Access, 2025)

Enhancing medical image privacy in IoT with bit-plane level encryption using chaotic map. - Fatima Asiri; Wajdan Al Malwi; Tamara Zhukabayeva; Ibtehal Nafea; Abdullah Aziz; Nadhmi A. Gazem; Abdullah Qayyum (Frontiers Comput. Neurosci., 2025)