Faridah Binti Yunos, Nurul Aina Binti Rosli, and Witriany Basri. “Double Encryption of Grayscale Images Using Hill Cipher With Self-Invertible Keys”. Applied Mathematics and Computational Intelligence (AMCI) 15, no. 2 (June 2, 2026): 40–58. Accessed June 5, 2026. https://ejournal.unimap.edu.my/index.php/amci/article/view/2578.