W. B. Nugroho, A. Susanto, C. A. Sari, E. H. Rachmawanto, and M. Doheir, “A ROBUST AND IMPERCEPTIBLE FOR DIGITAL IMAGE ENCRYPTION USING CHACHA20”, J. Tek. Inform. (JUTIF), vol. 5, no. 2, pp. 397-404, Apr. 2024.