Annisah, Yessi Fitri, and Imran Lubis. “Perancangan Aplikasi Steganografi Dengan Algoritma Twelve Square Substitution Cipher Dan Metode Indeks Variabel”. SNASTIKOM 2, no. 1 (December 19, 2023): 281–288. Accessed January 22, 2026. https://prosiding.snastikom.com/index.php/SNASTIKOM2020/article/view/117.