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Multiple image encryption scheme based on pixel exchange operation and vector decomposition
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DOI：10.1016/j.optlaseng.2017.10.010.png)
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We propose a new multiple image encryption scheme based on a pixel exchange operation and a basic vector detomposition in Fourier domain. In this algorithm, original images are imported via a pixel exchange operator, from which scrambled images and pixel position matrices are obtained. Scrambled images encrypted into phase information are imported using the proposed algorithm and phase keys are obtained from the difference between scrambled images and synthesized vectors in a charge-coupled device (CCD) plane. The final synthesized vector is used as an input in a random phase encoding (DRPE) scheme. In the proposed encryption scheme, pixel position matrices and phase keys serve as additional private keys to enhance the security of the cryptosystem which is based on a 4-f system. Numerical simulations are presented to demonstrate the feasibility and robustness of the proposed encryption scheme. (C) 2017 Elsevier Ltd. All rights reserved.
Keyword:
Multiple image encryption
Pixel exchange
Vector decomposition
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