Özet:

Abstract Due to the ease with which image manipulation is accomplished, digital image authentication plays a major challenge in the digital revolution. With the rapid advancement of healthcare technology, electronic medical records can now be easily stored in the telemedicine field, which raises the concern for the security of the patient's medical data. Watermarking plays a major role in the healthcare domain as patient records are shared securely over the network if records are encoded with an encryption technique and inserted as a watermark. This must preserve the image's quality and correctly extract patient data from the encoded image even if any geometrical attack is performed to steal the information. Several watermarking approaches have been developed still need to develop a robust and secure watermarking scheme. This paper reviews watermarking scheme along with chaos-based encryption techniques and the benefits of using them over traditional encryption techniques. A watermarking approach based on pixel color correlation (WPCC) is proposed and chaos-based encryption and the Arnold transformation is used, to establish two levels of protection for patient medical records. To ensure secure transmission of information, the proposed approach encrypts the patient record before embedding it as a watermark in a medical image. The performance of the proposed method is evaluated and the system’s robustness is checked against different attacks with Bit Error Rate (BER) and Normalized Correlation parameter (NCC). Proposed method generates images with high Peak Signal Noise Ratio (PSNR) ranging from 24.74dB to 36.07dB and Structural Similarity Index (SSIM) ranging from values 0.84 to 0.97. Assessment of evaluation parameters shows that the designed system is able to hide and extract a patient’s medical record securely and the system is resilient to different attacks. 

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