Enhanced Security In Medical Image Steganography -A Hybrid Approach Using Spatial And Transform Domain

Image steganography is an essential method in the subject of information hiding, which is the art of concealing confidential data within a regular image to prevent tampering. There is a risk of tampering with medical images when they are transmitted over an insecure public network, which makes it difficult for diagnosis. As a result, it's critical to ensure the integrity of these images to avoid any unwanted changes. In this paper, we use the SHA256 technique to calculate the hash value of ROI to ensure medical image integrity. DCT and IDCT will be used to embed the hash in the RONI. We may check the image's authenticity by evaluating the hash value at the receiver end. The hash function does not match if there is any tampering. This study presents a hybrid approach to enhancing security. The altered image is encased in a regular-looking image. It aids in the concealment of confidential data. This multi-pronged approach will improve security.