ELKHALIFA, Mohamed. Human-Centric Audio CAPTCHA for the Visually Impaired: Usability and Efficiency Evaluation. International Journal of Information & Digital Security, [S. l.], v. 4, n. 1, p. 4–13, 2026. DOI: 10.54878/tmb1mf10. Disponível em: https://emiratesscholar.com/directory/index.php/ijidc/article/view/1235.. Acesso em: 23 apr. 2026.