Image Processing

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

[+] Author Affiliations
Madhusudan Joshi

International Centre for Automotive Technology, IMT Manesar, Plot No. 26, Gurgaon, Haryana 122050, India

Kehar Singh

Indian Institute of Technology Delhi, Department of Physics, New Delhi, 110016, India

Opt. Eng. 50(4), 047007 (April 18, 2011). doi:10.1117/1.3569688
History: Received November 24, 2010; Revised January 28, 2011; Accepted March 02, 2011; Published April 18, 2011; Online April 18, 2011
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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.

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© 2011 Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation

Madhusudan Joshi and Kehar Singh
"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", Opt. Eng. 50(4), 047007 (April 18, 2011). ; http://dx.doi.org/10.1117/1.3569688


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