DIMPLE D. VALIA; RAVI K. SHETH. A Review on Secure Email Communications in E-commerce. International Journal of Advance Research in Engineering, Science & Technology, [S. l.], v. 4, n. 4, p. 245–248, 2017. Disponível em: https://ijarest.org/index.php/ijarest/article/view/1067. Acesso em: 3 jul. 2025.