GUPTA, Prachi; KUMAR, Manoj. Application of Vigenere Cipher to Enhance the Playfair Cipher Security. International Journal of Psychosocial Rehabilitation, [S. l.], v. 24, n. 8, p. 15749–15755, 2020. DOI: 10.61841/ydmps398. Disponível em: https://www.psychosocial.com/index.php/ijpr/article/view/12279. Acesso em: 22 aug. 2026.