A Novel Grayscale Image Encryption Scheme Based on the Block-Level Swapping of Pixels and the Chaotic System. - Muhammad Hanif 007; Nadeem Iqbal 001; Fida Ur Rahman; Muhammad Adnan Khan 001; Taher M. Ghazal; Sagheer Abbas; Munir Ahmad; Hussam M. N. Al Hamadi; Chan Yeob Yeun (Sensors, 2022)