%0 Journal Article
%T A New Watermarking Approach Based on Combination of Reversible Watermarking and CDMA in Spatial and DWT Domain
%A S.Bekkouche & A.Chouarfia
%J International Journal of Security
%D 2011
%I Computer Science Journals
%X Image watermarking can be defined as a technique that allows insertion of imperceptible andindelible digital data into an image. In addition to its initial application which is the copyright,watermarking can be used in other fields, particularly in the medical field in order to contribute tosecure images shared on the network for telemedicine applications. In this report we study somewatermarking methods and the comparison result of their combination, the first one is based onthe CDMA (Code Division Multiple Access) in DWT(Discrete Wavelet Transform) domain, notedCDMA-DWT and CDMA in spatial domain, noted CDMA-SD and their aim are to verify theimage authenticity whereas the second one is the reversible watermarking (the least significantbits LSB and cryptography tools) , the reversible carte mapping RCM their objective are to checkthe integrity of the image and to keep the Confidentiality of the patient data. A new scheme ofwatermarking is the combination of the reversible watermarking method and the method ofCDMA-DWT and the second is the combination of the reversible watermarking and the methodof CDMA-sp to verify the three security properties Integrity, Authenticity and Confidentiality ofmedical data and patient information. In the end, we made a comparison between these methodswithin the parameters of quality of medical images Initially, an in-depth study on thecharacteristics of medical images would contribute to improve these methods to measurementshave been done on the watermarked image to verify that this technique does not lead to a wrongdiagnostic. The robustness of the watermarked images against attacks has been verified on theparameters of PSNR (Peak Signal to Noise Ratio), MSE (Mean Square Error), MAE (MeanAbsolute Error) and SNR (Signal to Noise Ratio ) which show that the resulting quality ofcombination watermarking method is good in DWT than other techniques.
%K Watermarking
%K Reversible watermarking
%K CDMA-DWT
%K Integrity
%K Authentication
%K Confidentiality.
%U http://cscjournals.org/csc/manuscript/Journals/IJS/volume5/Issue1/IJS-64.pdf