Secure Medical Data Transmission Using S-DES Encryption and Pixel Value Differencing-Based Steganography. Gharyan University Journal of Engineering Science (GUJES), [S. l.], v. 2, n. 2, p. 137–155, 2026. DOI: 10.65568/gujes.2026.020212. Disponível em: https://journals.gu.edu.ly/index.php/gujes/article/view/105. Acesso em: 11 nov. 2026.