EWEOYA, I.; DARAMOLA, O.; OMOREGBE, N. Improving Security Using Refined 16 X 16 Playfair Cipher for Enhanced Advanced Encryption Standard (AES). Covenant Journal of Informatics and Communication Technology, [S. l.], v. 2, n. 1, 2013. Disponível em: https://journals.covenantuniversity.edu.ng/index.php/cjict/article/view/77. Acesso em: 3 may. 2024.