Pixel steganography method for grayscale image steganography on colour images. Periodicals of Engineering and Natural Sciences, [S. l.], v. 9, n. 3, p. 615–624, 2021. DOI: 10.21533/pen.v9.i3.875. Disponível em: https://pen.ius.edu.ba/index.php/pen/article/view/875. Acesso em: 21 apr. 2026.