NORI, Ahmed S.; ABDULMAJEED, Ansam O. Design and implementation of Threefish cipher algorithm in PNG file. Sustainable Engineering and Innovation, [S. l.], v. 3, n. 2, p. 79–91, 2021. DOI: 10.37868/sei.v3i2.id131. Disponível em: https://sei.ardascience.com/index.php/journal/article/view/131. Acesso em: 13 aug. 2026.