Securing NFT Copyright with Robust DWT-Hessenberg-SVD Watermarking and RSA Signatures

Muhammad Romadhona Kusuma; Efri Syamsul  Bahri

doi:10.29207/resti.v9i6.6747

Authors

Muhammad Romadhona Kusuma Universitas Nusa Mandiri
Efri Syamsul Bahri Asia e University

DOI:

https://doi.org/10.29207/resti.v9i6.6747

Keywords:

Image Watermarking, DWT-Hessenberg-SVD, RSA Digital Signature, Robustness, NFT Copyright Protection

Abstract

In the digital era, protecting visual content from misuse and forgery is essential. This study proposes a robust image watermarking method by integrating Discrete Wavelet Transform (DWT), Hessenberg Decomposition (HD), and Singular Value Decomposition (SVD), aiming to enhance watermark imperceptibility and resilience against common image attacks. Additionally, the system incorporates RSA digital signatures within the watermark metadata to ensure verifiable authenticity in NFT (Non-Fungible Token) applications. The method was implemented using Python and tested on multiple grayscale images across various attack scenarios, including noise addition and compression. Experimental results demonstrate high SSIM and PSNR values, confirming the method's effectiveness in maintaining both visual fidelity and embedded watermark integrity. These findings support the potential of this approach for secure and scalable NFT copyright protection.

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