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In the cancerology domain, we were brought to make periodic mammographyimages to monitor tumor patients. Oracle Database Management system (DBMS) is asolution to manage these images with patient's data recorder. Knowing the largesize of medical images of mammograms, the Oracle DBMS saves these imagesoutside the Oracle database using external LOBs. The link between these imagesand Oracle is done through the BFILE. At this level, two problems are raised:the first problem is that access to these images can become impossible becausethe link is likely to be broken. The second problem is security, the fact thatthe images are saved outside the Oracle database, they do not benefit from itspowerful security. The protection of the integrity and confidentiality of dataand patient images are a necessity defended by laws and they must be preservedagainst any unauthorized access, alteration or destruction. In this paper, wepropose the method of reversible watermarking technique based on the differenceexpansion to resolve these two problems and explore its use in search andretrieval strategy of images.

Secure and Image Retrieval based on Multipurpose Watermarking for Mammography Images Database