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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 10 — May. 15, 2014
  • pp: 3074–3077

Experimental QR code optical encryption: noise-free data recovering

John Fredy Barrera, Alejandro Mira-Agudelo, and Roberto Torroba  »View Author Affiliations


Optics Letters, Vol. 39, Issue 10, pp. 3074-3077 (2014)
http://dx.doi.org/10.1364/OL.39.003074


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Abstract

We report, to our knowledge for the first time, the experimental implementation of a quick response (QR) code as a “container” in an optical encryption system. A joint transform correlator architecture in an interferometric configuration is chosen as the experimental scheme. As the implementation is not possible in a single step, a multiplexing procedure to encrypt the QR code of the original information is applied. Once the QR code is correctly decrypted, the speckle noise present in the recovered QR code is eliminated by a simple digital procedure. Finally, the original information is retrieved completely free of any kind of degradation after reading the QR code. Additionally, we propose and implement a new protocol in which the reception of the encrypted QR code and its decryption, the digital block processing, and the reading of the decrypted QR code are performed employing only one device (smartphone, tablet, or computer). The overall method probes to produce an outcome far more attractive to make the adoption of the technique a plausible option. Experimental results are presented to demonstrate the practicality of the proposed security system.

© 2014 Optical Society of America

OCIS Codes
(070.4560) Fourier optics and signal processing : Data processing by optical means
(060.4785) Fiber optics and optical communications : Optical security and encryption
(100.4998) Image processing : Pattern recognition, optical security and encryption

ToC Category:
Image Processing

History
Original Manuscript: February 21, 2014
Revised Manuscript: March 28, 2014
Manuscript Accepted: April 10, 2014
Published: May 15, 2014

Citation
John Fredy Barrera, Alejandro Mira-Agudelo, and Roberto Torroba, "Experimental QR code optical encryption: noise-free data recovering," Opt. Lett. 39, 3074-3077 (2014)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-39-10-3074


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