An Efficient Algorithm for Protecting and Authenticating Medical Image

With the advance in the medical image from photographic ï¬lm (analogy) to digital ï¬le, how to avoid medical image modiï¬ed by malice and hide the patient´s information into their medical image has become the promising research issue. It is difï¬cult to embed the information of patient to medical images because most pixels of this kind of images are close to black or white. In this paper, an effective method based on singular value decomposition (SVD) is presented to hide the patient´s information into medical images which can be used to protect and authenticate their images, called Non-ROI Hidding Algorithm (NRHA). More precisely, the SVD is ï¬rst employed to ï¬nd the features of medical image, and then the information of patient will be hidden in the non-ROI area of the image. To evaluate the performance of the proposed algorithm, we use it to hide the information of patient to several digital medical images. Our experimental results indicate that the proposed method can be used to avoid malicious attacks because it provides an effective way to distinguish good images from malicious ones. As a result, the patient information can be protected by using the proposed method.