Hermansa, Rusydi Umar, and Anton Yudhana. 2020. “Implementation of Playfair Cipher and Least Significant Bit Algorithms in Digital Imagery: Implementasi Algoritma Playfair Cipher Dan Least Significant Bit Pada Citra Digital”. Jurnal RESTI (Rekayasa Sistem Dan Teknologi Informasi) 4 (3): 454-61. https://doi.org/10.29207/resti.v4i3.1877.