MAHMUDAH, Muhlisatul; IRAWATI, Tri Novita; AINI, Friska B. Nur. Polyalphabetic cipher cryptosystem application in making anti-hacker passwords learning management systems in junior high schools. Alifmatika: Jurnal Pendidikan dan Pembelajaran Matematika, [S. l.], v. 6, n. 1, p. 90–103, 2024. DOI: 10.35316/alifmatika.2024.v6i1.90-103. Disponível em: https://journal.ibrahimy.ac.id/index.php/Alifmatika/article/view/4696. Acesso em: 22 jan. 2026.