Sumadi, M. T., Zahir S, A. N. and Faldi, F. (2024) “SECURE AUDIO FILES USING VIGENERE CIPHER AND PLAYFAIR CIPHER”, Jurnal Teknik Informatika (Jutif). Purwokerto, 5(6), pp. 1497–1504. doi: 10.52436/1.jutif.2024.5.6.1624.