Watermarking and encryption in medical image through roi-lossless compression

摘要

The transfer of medical data is too done securely over the community network and manipulated in an effective manner. For the enhancement of safety and verification of medical records, watermarking method is used for more identification then references. So there is great need of elimination such illegal copyright of digital media. Digital watermarking is the powerful solution to this problem. The information is embedded in image which is used in some other applications as fingerprint; owner identification etc. The paper proposes SHA 256, AES (Advanced encryption standard) and arithmetic compression techniques. The ROI of medical image is irregularly shaped and it is an area which contains important information. The medical image and protection of information and the whole image of SHA 256 is embedded in the least significant bits of the ROI. The compression of recovered SHA 256 image and extracted watermarking used for validation. Fragile watermarking scheme can detect tamper and recover the images. The watermarking technique being developed to confirm and simplify files verification, safety and copyright protection, privacy protection, safety and management of digital media.