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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 51, Iss. 34 — Dec. 1, 2012
  • pp: 8068–8073

Optical encryption using pseudorandom complex spatial modulation

Tamás Sarkadi and Pál Koppa  »View Author Affiliations


Applied Optics, Vol. 51, Issue 34, pp. 8068-8073 (2012)
http://dx.doi.org/10.1364/AO.51.008068


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Abstract

In this paper we propose a new (to our knowledge) complex spatial modulation method to encode data pages applicable in double random phase encryption (DRPE) to make the system more resistant to brute-force attack. The proposed modulation method uses data page pixels with random phase and amplitude values with the condition that the intensity of the interference of light from two adjacent pixels should correspond to the encoded information. A differential phase contrast technique is applied to recover the data page at the output of the system. We show that the proposed modulation method can enhance the robustness of the DRPE technique using point spread function analysis. Key space expansion is determined by numeric model calculations.

© 2012 Optical Society of America

OCIS Codes
(200.4560) Optics in computing : Optical data processing
(210.1635) Optical data storage : Coding for optical storage

ToC Category:
Optics in Computing

History
Original Manuscript: July 31, 2012
Revised Manuscript: October 9, 2012
Manuscript Accepted: November 5, 2012
Published: November 27, 2012

Citation
Tamás Sarkadi and Pál Koppa, "Optical encryption using pseudorandom complex spatial modulation," Appl. Opt. 51, 8068-8073 (2012)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-51-34-8068

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