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Transactions: WSEAS TRANSACTIONS ON BUSINESS AND ECONOMICS
Transactions ID Number: 53-772
Full Name: Bekkouche Souad
Position: Other
Age: ON
Sex: Female
Address: soumam city
Country: ALGERIA
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E-mail address: sbekkouche2008@gmail.com
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Title of the Paper: A new watermarking approach- Combined RW / CDMA in Spatial and Frequency
Authors as they appear in the Paper: S. Bekkouche , A .Chouarfia
Email addresses of all the authors: chouarfia@univ-usto.dz
Number of paper pages: 10
Abstract: In this report we study some watermarking methods and the comparison result of their combination, the first one is based on the CDMA (Code Division Multiple Access) in frequency domain DWT(Discrete Wavelet transform)noted CDMA-DWT ,CDMA in DCT(Discrete Cosine Transform ) noted CDMA-DCT and CDMA in spatial domain noted CDMASD and its aim is to verify the image authenticity whereas the second one is the reversible watermarking (the least significant bits LSB and cryptography tools) noted RW and the reversible carte mapping RCM its objective is to check the integrity of the image and to keep the Confidentiality of the patient data. A new scheme of watermarking is the combination of the reversible watermarking and the CDMA method on the field of spatial domain noted RW/CDMA-SD and second combination in frequency domain (DWT and DCT ) domain noted RW/ CDMADWT and RW/CDMA-DCT to verify the three security properties Integrity, Authenticity and confidentiality of medical d!
ata and patient information .In the end ,we made a comparison between these methods within the parameters of quality of medical images Initially, an in-depth study on the characteristics of medical images would contribute to improve these methods to measurements have been done on the watermarked image to verify that this technique does not lead to a wrong diagnostic. The robustness of the watermarked images against attacks has been verified on the parameters of PSNR (Peak Signal to Noise Ratio), MSE (Mean Square Error),MAE (Mean Absolute Error) and SNR(Signal to Noise Ratio ) which show that the resulting quality of combination watermarking method is good in DCT than in DWT and spatial domain.
Keywords: -Reversible watermarking, CDMA-SD, CDMA-DWT,CDMA-DCT, Integrity, Authentication, ConfidentialityCombination,
EXTENSION of the file: .pdf
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