Ahmed, Ibrahim, Awos Kh. Ali, and Mahmood S. Mahmood. “Employing Hybrid Watermarking to Improve Email Security Against Cyber Attacks”. Journal of Soft Computing and Data Mining 6, no. 1 (June 30, 2025): 435–447. Accessed August 13, 2026. https://journal.uthm.edu.my/index.php/jscdm/article/view/20220.