Hartanto, Agus, Lenny Margaretta Huizen, April Firman Daru, and Surono Surono. “Penerapan Hardening Server Linux Untuk Meningkatkan Keamanan Sistem Messaging IoT”. Jurnal Transformatika 23, no. 2 (January 24, 2026): 220–237. Accessed June 29, 2026. https://journals.usm.ac.id/index.php/transformatika/article/view/13776.