PUTRO, S.; PAMUNGKAS, S. W.; ARIYUS, D. Modification of Two Algorithms Playfair And Caesar Chiper Al-gorithm Using Postal Code City: Modification of Two Algorithms Playfair And Caesar Chiper Al-gorithm Using Postal Code City. Jurnal Mantik, [S. l.], v. 3, n. 4, p. 412-419, 2020. Disponível em: http://ejournal.iocscience.org/index.php/mantik/article/view/584. Acesso em: 26 oct. 2026.