PERMANA, I.; HARDJIANTO, M.; AHMAD BAIHAQI, K. Securing the Website Login System with the SHA256 Generating Method and Time-based One-time Password (TOTP). SYSTEMATICS, Karawang, Indonesia, v. 2, n. 2, p. 65-71, 2020. DOI: 10.35706/sys.v2i2.3756. Disponível em: https://journal.unsika.ac.id/index.php/systematics/article/view/3756. Acesso em: 20 sep. 2020.