PassMatrix: Graphical Based Authentication System for Shoulder Surfing Attack Resistant. International Journal of Advance Engineering and Research Development (IJAERD), [S. l.], v. 4, n. 6, p. 13–19, 2017. Disponível em: https://ijaerd.org/index.php/IJAERD/article/view/2865. Acesso em: 9 sep. 2025.