QR Code-based Digital Watermarking For Protecting Personal Information On CT-Scan Images

May 21, 2026

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Rapid exchange of medical CT-scan images raises major concerns about protecting patient data security and privacy. This work proposes a robust digital watermarking scheme that embeds an encrypted QR-code watermark into CT images while preserving visual quality. The method combines DWT-SVD for embedding in high-frequency sub-bands with hybrid protection using RSA to secure the AES key and AES to encrypt the payload. A chaotic logistic map scrambles the QR data to strengthen resilience. Experiments report an average PSNR of 37.9 dB and strong robustness against noise, cropping, scaling, and JPEG compression.

LanguageEnglish

CategoryHealthcare

FormatPDF

Pages8

Reading Time20 min

Introduction

Digital watermarking for medical images

QR code usage in watermarking

DWT-SVD embedding strategy

Visual cryptography and encryption framework

FAQs

How does the method protect the watermark information?

The QR-code-based watermark is encrypted with AES, with the AES key secured by RSA, and the QR content is scrambled using a chaotic logistic map to strengthen confidentiality.

May 21, 2026

Upload by Anda