MANEKAR, Mr. Sachin. MULTI-FACTOR AUTHENTICATION IN MOBILE APPLICATIONS: A SURVEY OF METHODS AND CHALLENGES. Journal of Global Research in Mathematical Archives(JGRMA), [S. l.], v. 12, n. 9, p. 30–38, 2025. DOI: 10.5281/zenodo.17310139. Disponível em: https://jgrma.com/index.php/jgrma/article/view/649. Acesso em: 10 oct. 2025.