Enhancing Data Security in Medical Information System Using the   Watermarking Techniques and Oracle SecureFile LOBs
  In this paper, we propose an efficient digital watermarking scheme to strengthen the security level already present in the database management system and to avoid illegal access to comprehensive content of database including patient's information. Doctors diagnose medical images by seeing Region of Interest (ROI). A ROI of a medical image is an area including important information and must be stored without any distortion. If a medical image is illegally obtained or if its content is changed, it may lead to wrong diagnosis. We substitute the part out of ROI of LSB bitplane of the image with the patient data and a binary feature map. This latter is obtained by extracting edges of the resized image to the quarter of its size using Laplacian operator. This image is directly integrated into the database. The edge map and invariant moments are used to check the integrity of the image. 
Said Aminzou, Brahim Er-Raha, Youness Idrissi Khamlichi, Mustapha   Machkour, Karim Afdel
cs.CR