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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 34, Iss. 3 — Feb. 1, 2009
  • pp: 331–333

Impulse attack free double-random-phase encryption scheme with randomized lens-phase functions

Pramod Kumar, Arvind Kumar, Joby Joseph, and Kehar Singh  »View Author Affiliations


Optics Letters, Vol. 34, Issue 3, pp. 331-333 (2009)
http://dx.doi.org/10.1364/OL.34.000331


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Abstract

Security of the conventional Fourier-based double-random-phase encryption (DRPE) technique is prone to impulse attacks, as the Fourier transform (FT) of a delta function results in a unity function. To negate such an attack, the phase factors of the lenses are modified by multiplying these with random-phase functions. Owing to this modification of the FT as a result of the randomized lens phase function, a modified FT ( MFT LR ) gives the random output for a delta function input. Employing MFT LR in the DRPE technique enhances the security features and makes the encryption system safer from the impulse attack. Numerical and experimental results are given for the validation of the proposed technique.

© 2009 Optical Society of America

OCIS Codes
(070.0070) Fourier optics and signal processing : Fourier optics and signal processing
(100.0100) Image processing : Image processing

ToC Category:
Image Processing

History
Original Manuscript: September 18, 2008
Revised Manuscript: November 26, 2008
Manuscript Accepted: December 9, 2008
Published: January 27, 2009

Citation
Pramod Kumar, Arvind Kumar, Joby Joseph, and Kehar Singh, "Impulse attack free double-random-phase encryption scheme with randomized lens-phase functions," Opt. Lett. 34, 331-333 (2009)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-34-3-331

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