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), pp. 454–461. doi:10.29207/resti.v4i3.1877.