Quantum Watermarking: A Comprehensive Review of Principles, Challenges, and Future Prospects

ASM Sc. J., 21(2), 2026

Published on October 22, 2026

https://doi.org/10.32802/asmscj.2026.031

Author: Rashmi M Hullamani, Mahantesh Mattada, Kavitha KJ

Abstract

Quantum Watermarking (QWM) is an emerging field that combines quantum information theory with digital watermarking techniques to enhance the security of digital content. By leveraging quantum properties such as superposition, entanglement, and the no-cloning theorem, QWM provides robust protection against unauthorised access, tampering, and duplication—offering a significant advantage over classical methods. As the volume and value of digital data grow, the need for advanced intellectual property protection becomes increasingly vital, making QWM a promising approach to next-generation data security. This paper presents a comprehensive review of the theoretical foundations of QWM, its core principles, and various classification methods based on quantum states, embedding techniques, and application domains such as authentication, copyright protection, and tamper detection. It also explores the mathematical models underlying QWM, including quantum state representations and error correction protocols, along with recent advances in experimental validations. Despite its potential, QWM faces challenges such as noise sensitivity, scalability limitations, and high computational resource requirements. Issues related to secure key management and implementation vulnerabilities also remain. Nevertheless, this review aims to serve as a foundational reference for researchers and practitioners, highlighting the promise of QWM in reshaping digital content security, particularly in sensitive domains like digital forensics and healthcare.

Keywords: entanglement, no-cloning, quantum states, QWM, tampering