Abrar, M. and Nasution, M. I. P. (2024) “Analisis Peningkatan Keamanan Data Two Step Verification pada Aplikasi Whatsapp Messenger”, Surplus: Jurnal Ekonomi dan Bisnis, 2(2), pp. 335–340. Available at: https://yptb.org/index.php/sur/article/view/836 (Accessed: 10 February 2026).