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Titre: Digital double random amplitude image encryption method based on the symmetry property of the parametric discrete Fourier transform
Auteur(s): Bekkouche, Toufik
Bouguezel, Saad
Mots-clés: complex-to-real conversion
double random amplitude encryption
parametric discrete Fourier transforms
real-to-real image encryption
Date de publication: 27-nov-2018
Collection/Numéro: Electronic Imaging;Volume 27, Issue 2, 023033 (Mar∕Apr 2018)
Résumé: We propose a real-to-real image encryption method. It is a double random amplitude encryption method based on the parametric discrete Fourier transform coupled with chaotic maps to perform the scrambling. The main idea behind this method is the introduction of a complex-to-real conversion by exploiting the inherent symmetry property of the transform in the case of real-valued sequences. This conversion allows the encrypted image to be real-valued instead of being a complex-valued image as in all existing double random phase encryption methods. The advantage is to store or transmit only one image instead of two images (real and imaginary parts). Computer simulation results and comparisons with the existing double random amplitude encryption methods are provided for peak signal-to-noise ratio, correlation coefficient, histogram analysis, and key sensitivity.
URI/URL: http://dspace.univ-setif.dz:8888/jspui/handle/123456789/2963
ISSN: 1017-9909
Collection(s) :Articles

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