SARITA SINGH. A Novel Technique for Enhancement of the Security of Playfair Cipher. International Journal of Computer Engineering in Research Trends, [S. l.], v. 7, n. 1, p. 8–12, 2023. Disponível em: https://www.ijcert.org/index.php/ijcert/article/view/831. Acesso em: 19 apr. 2026.