MARDIANTO, Is; KUSWANDI, Kuswandi. Implementasi Keamanan pada Transaksi Data Menggunakan Sertifikat Digital X.509. Ultimatics : Jurnal Teknik Informatika, [S. l.], v. 8, n. 1, p. 1–10, 2016. DOI: 10.31937/ti.v8i1.496. Disponível em: https://ejournals.umn.ac.id/index.php/TI/article/view/496. Acesso em: 17 sep. 2025.