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Optics Letters

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  • Editor: Anthony J. Campillo
  • Vol. 32, Iss. 9 — May. 1, 2007
  • pp: 1060–1062

Spread-space spread-spectrum technique for secure multiplexing

B. M. Hennelly, T. J. Naughton, J. McDonald, J. T. Sheridan, G. Unnikrishnan, D. P. Kelly, and B. Javidi  »View Author Affiliations


Optics Letters, Vol. 32, Issue 9, pp. 1060-1062 (2007)
http://dx.doi.org/10.1364/OL.32.001060


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Abstract

A novel technique for multiplexing complex images is proposed in which each image may be demultiplexed only if a set of random encryption keys is known. The technique utilizes the ability of the double random phase encoding method to spread a signals’ energy in both the space and the spatial frequency domains in a controlled manner. To multiplex, images are independently encrypted with different phase keys and then superimposed by recording sequentially on the same material. Each image is extracted by using the particular key associated with it. During decryption the energy from the other images is further spread, making it possible to minimize its effects by using suitable filters. Wigner analysis is applied to the technique, and numerical results are presented.

© 2007 Optical Society of America

OCIS Codes
(070.2580) Fourier optics and signal processing : Paraxial wave optics
(070.6020) Fourier optics and signal processing : Continuous optical signal processing
(090.4220) Holography : Multiplex holography

ToC Category:
Fourier Optics and Optical Signal Processing

History
Original Manuscript: November 1, 2006
Revised Manuscript: January 11, 2007
Manuscript Accepted: January 30, 2007
Published: April 3, 2007

Citation
B. M. Hennelly, T. J. Naughton, J. McDonald, J. T. Sheridan, G. Unnikrishnan, D. P. Kelly, and B. Javidi, "Spread-space spread-spectrum technique for secure multiplexing," Opt. Lett. 32, 1060-1062 (2007)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-32-9-1060


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