Qadriah, Laila, et al. “Sistem Pengamanan Dokumen Dengan Algoritma Time-Based One Time Password (TOTP) Pada Two-Factor Authentation (2FA)”. Jurnal Sains Dan Informatika, vol. 9, no. 1, June 2023, pp. 29-35, doi:10.34128/jsi.v9i1.519.