Faridah Binti Yunos, Nurul Aina Binti Rosli, & Witriany Basri. (2026). Double Encryption of Grayscale Images Using Hill Cipher with Self-Invertible Keys. Applied Mathematics and Computational Intelligence (AMCI), 15(2), 40–58. https://doi.org/10.58915/amci.v15i2.2578