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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 17 — Jun. 10, 2009
  • pp: 3120–3128

Efficient encrypting procedure using amplitude and phase as independent channels to display decoy objects

John Fredy Barrera and Roberto Torroba  »View Author Affiliations


Applied Optics, Vol. 48, Issue 17, pp. 3120-3128 (2009)
http://dx.doi.org/10.1364/AO.48.003120


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Abstract

Objects acting as inputs of encrypting optical systems can be regarded as having two independent channels: amplitude and phase. In this context, we can use the term “complex objects” to refer these input objects. In this work we explore the way to perform an undercover operation where one channel (amplitude) is used to depict decoy information to confuse intruders, while the other (phase) operates with the true information. Besides, we use the Gerchberg–Saxton algorithm to transform the amplitude and phase encrypted information into pure phase data, therefore increasing the efficiency of the technique as only a single matrix containing these data needs to be sent. Finally, as an example to show the potential of the method, we combine the separate channels in a multiplexing technique with the Gerchberg–Saxton algorithm to generate an efficient multiuser secure process.

© 2009 Optical Society of America

OCIS Codes
(070.0070) Fourier optics and signal processing : Fourier optics and signal processing
(070.4560) Fourier optics and signal processing : Data processing by optical means
(100.0100) Image processing : Image processing
(100.4998) Image processing : Pattern recognition, optical security and encryption

ToC Category:
Image Processing

History
Original Manuscript: December 10, 2008
Revised Manuscript: April 20, 2009
Manuscript Accepted: May 7, 2009
Published: June 1, 2009

Citation
John Fredy Barrera and Roberto Torroba, "Efficient encrypting procedure using amplitude and phase as independent channels to display decoy objects," Appl. Opt. 48, 3120-3128 (2009)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-17-3120

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