MUSHTAQ SHER ALI, Fairouz. Enhancing the Security of Playfair Cipher by Stream Cipher. Journal of Al-Qadisiyah for Computer Science and Mathematics, [S. l.], v. 6, n. 2, p. 169–175, 2017. Disponível em: https://jqcsm.qu.edu.iq/index.php/journalcm/article/view/116. Acesso em: 15 nov. 2024.