On Thursday, July 24, 2025, the College of Electronics Engineering – Department of Computer and Informatics Engineering at the University of Ninevah held the defense of the master’s thesis by student Sura Nashwan Yassin, titled:
“Chaos-Based Multimedia Encryption and Watermarking Schemes”
The thesis presents an in-depth study of digital content protection using watermarking techniques and chaos-based encryption. These techniques were applied in both spatial and spatio-temporal-frequency domains to ensure the protection of multimedia content against tampering and unauthorized use.
The researcher employed methods such as Lifting Wavelet Transform (LWT) to embed watermarks into the content with minimal impact on its quality. The performance of the watermarking was evaluated using quality metrics like Signal-to-Noise Ratio (SNR), Peak Signal-to-Noise Ratio (PSNR), and Structural Similarity Index (SSIM). Furthermore, the proposed system was tested under various attacks, including noise addition, brightness and contrast adjustments, and frame rate alterations, to assess its robustness and effectiveness in preserving the original features of the content.
The study concluded that the proposed system, combining chaos-based encryption with watermarking techniques, provides effective protection for digital content without significantly degrading its quality. Experimental results showed that the watermark remained largely unaffected by noise interference, while brightness and contrast adjustments resulted in only minor changes. The study demonstrated that the system is a viable solution for resisting manipulation attempts while maintaining essential content quality, thus highlighting the importance of applying these technologies in copyright protection and digital documentation across multimedia platforms.
The examination committee consisted of:
1. Asst. Prof. Dr. Mohammed Abdulmutalib Mohammed – University of Ninevah / College of Electronics Engineering (Chair)
2. Asst. Prof. Dr. Ammar Idrees Dawood – University of Mosul / College of Engineering (Member)
3. Lect. Dr. Emad Atiya Khalaf – University of Ninevah / College of Electronics Engineering (Member)
4. Asst. Prof. Dr. Mohammed Hazem Younis – University of Ninevah / College of Electronics Engineering (Member & Supervisor)
5. Lect. Dr. Majid Dhirar Younis – University of Ninevah / College of Electronics Engineering (Member & Supervisor)
We extend our heartfelt congratulations to the researcher and the examination committee, wishing them continued success and excellence.
