Pengamanan File Excel Berformula dengan Menggunakan Kriptografi Advanced Encryption Standard-256 Dan Encoding Base64. Jurnal EurekaMatika, [S. l.], v. 14, n. 1, p. 17–24, 2026. DOI: 10.17509/jem.v14i1.142. Disponível em: https://ejournal-science.upi.edu/jem/article/view/142. Acesso em: 9 oct. 2026.