Hybrid SVD-DWT watermarking technique using AES algorithm for medical image safe transfer
Sondes Ajili, Mohamed Ali Hajjaji, Abdellatif Mtibaa · 2015
This manuscript presents a watermarking method based on Discrete Wavelet Transform (DWT) and Singular Value Decomposition (SVD) with the Advanced Encryption Standard (AES) algorithm encryption applied on medical image. The proposed schema will be developed to increase the protection and robustness along with security. In our algorithm, after decomposing the original image into four sub-bands in the second level of the DWT, we apply the SVD transform to the high band, and embed the binary watermark (patient's data) by changing the singular values. For enhance robustness, AES encryption algorithm are used. After application various type of attacks (JPEG compression, median filter, Salt and pepper, and cropping), we used the serial turbo code in order to control identification and, if possible, correct the watermark, Experiments and analysis results demonstrated that low distortion and increased robustness have been made in the process of watermarking, simultaneously, elevated security has been proved in the encryption phase. The evaluation studies are applied on MRI medical image.