Data Security for Email System in XML Format using Graceful Code and Graphical Password. International Journal of Current Engineering and Technology, [S. l.], v. 5, n. 2, p. 743–745, 2015. Disponível em: https://ijcet.evegenis.org/index.php/ijcet/article/view/2043. Acesso em: 11 apr. 2026.