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Optical Engineering

Simultaneous encryption of a color and a gray-scale image using byte-level encoding based on single-channel double random-phase encoding architecture in fractional Fourier domain
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Paper Abstract

A technique for simultaneous encryption of a color and a gray-scale image is proposed, using single-channel double random-phase encoding in the fractional Fourier domain. Prior to the encryption, the segregated red, green, and blue components of the color image and the gray-scale image are encoded into a single image after changing their bit formats. The format of the encoded image is such that it cannot be perceived by the human eye. The fractional orders of the fractional Fourier transform and two random-phase masks act as key parameters for the encryption. Performance of the scheme is verified against chosen plain-text and known plain-text attacks, respectively. The effect of noise on the performance of the proposed technique is analyzed.

Paper Details

Date Published: 1 April 2011
PDF: 9 pages
Opt. Eng. 50(4) 047007 doi: 10.1117/1.3569688
Published in: Optical Engineering Volume 50, Issue 4
Show Author Affiliations
Madhusudan Joshi, International Ctr. for Automotive Technology (India)
Kehar Singh, Indian Institute of Technology Delhi (India)

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