Journal
OPTICS COMMUNICATIONS
Volume 285, Issue 21-22, Pages 4227-4234Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optcom.2012.06.023
Keywords
Image encryption; Discrete multiple-parameter fractional; Fourier transform; Chaotic map
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Funding
- National Natural Science Foundation of China [60908026]
- Fundamental Research Funds for the Central Universities
- Natural Science Foundation of Heilongjiang Province of China [F200930]
- Harbin Science Foundation of China [2009RFQXG055, 2008RFQXG024]
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A double image encryption method is proposed by utilizing discrete multiple-parameter fractional Fourier transform and chaotic maps. One of the two original images scrambled by one chaotic map is encoded into the amplitude of a complex signal with the other original image as its phase. The complex signal multiplied by another chaotic random phase mask is then encrypted by discrete multiple-parameter fractional Fourier transform. The parameters in chaotic map and discrete multiple-parameter fractional Fourier transform serve as the keys of this encryption scheme. Numerical simulations have been done to demonstrate the performance of this algorithm. (C) 2012 Elsevier B.V. All rights reserved.
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