Riski Yanti, Nurdin, Al Khaidar. Implementation of Layered User Verification in Web Applications Using Google Authenticator-Based Two-Factor Authentication. j. of artif. intell. and eng. appl. [Internet]. 2025 Oct. 15 [cited 2026 May 2];5(1):1987-95. Available from: https://ioinformatic.org/index.php/JAIEA/article/view/1769