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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 52, Iss. 21 — Jul. 20, 2013
  • pp: 5133–5142

Information authentication system using interference of two beams in gyrator transform domain

Muhammad Rafiq Abuturab  »View Author Affiliations


Applied Optics, Vol. 52, Issue 21, pp. 5133-5142 (2013)
http://dx.doi.org/10.1364/AO.52.005133


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Abstract

A novel information authentication system, i.e., an asymmetric optical interference of two beams in the gyrator transform (GT) domain, is proposed. In this algorithm, the input color image is divided into R, G, and B channels. The complex field of each channel is constructed by the inverse Fourier transform of the channel attached with a random phase function. The phase-only mask (POM) and amplitude-only mask (AOM) are analytically derived from the complex field. The POM and AOM are separately gyrator transformed. The two asymmetric phase keys and two encrypted images are obtained by the amplitude truncations and phase truncations of the transform images, respectively. Finally, the encoded image is produced by the interference of two encrypted images. The two asymmetric keys and two angle parameters of the GT are regarded as additional keys for each channel to enhance the security level of the cryptosystem. The noniterative authentication procedure is devoid of any silhouette problem. The proposed system can be implemented digitally or optically, and its architecture is free from optical misalignment problems. The theoretical analysis and numerical simulation results both validate the proposed technique.

© 2013 Optical Society of America

OCIS Codes
(050.0050) Diffraction and gratings : Diffraction and gratings
(070.0070) Fourier optics and signal processing : Fourier optics and signal processing
(100.2000) Image processing : Digital image processing
(070.2615) Fourier optics and signal processing : Frequency filtering
(060.4785) Fiber optics and optical communications : Optical security and encryption

ToC Category:
Fourier Optics and Signal Processing

History
Original Manuscript: May 9, 2013
Revised Manuscript: June 13, 2013
Manuscript Accepted: June 21, 2013
Published: July 15, 2013

Citation
Muhammad Rafiq Abuturab, "Information authentication system using interference of two beams in gyrator transform domain," Appl. Opt. 52, 5133-5142 (2013)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-52-21-5133

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