Playfair with Multi Strata Encryption. Iraqi Journal of Science, [S. l.], v. 62, n. 9, p. 3237–3242, 2021. DOI: 10.24996/ijs.2021.62.9.36. Disponível em: https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/3864.. Acesso em: 1 may. 2024.