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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 53, Iss. 3 — Jan. 20, 2014
  • pp: 418–425

Fresnel domain nonlinear optical image encryption scheme based on Gerchberg–Saxton phase-retrieval algorithm

Sudheesh K. Rajput and Naveen K. Nishchal  »View Author Affiliations


Applied Optics, Vol. 53, Issue 3, pp. 418-425 (2014)
http://dx.doi.org/10.1364/AO.53.000418


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Abstract

We propose a novel nonlinear image-encryption scheme based on a Gerchberg–Saxton (G-S) phase-retrieval algorithm in the Fresnel transform domain. The decryption process can be performed using conventional double random phase encoding (DRPE) architecture. The encryption is realized by applying G-S phase-retrieval algorithm twice, which generates two asymmetric keys from intermediate phases. The asymmetric keys are generated in such a way that decryption is possible optically with a conventional DRPE method. Due to the asymmetric nature of the keys, the proposed encryption process is nonlinear and offers enhanced security. The cryptanalysis has been carried out, which proves the robustness of proposed scheme against known-plaintext, chosen-plaintext, and special attacks. A simple optical setup for decryption has also been suggested. Results of computer simulation support the idea of the proposed cryptosystem.

© 2014 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
(100.2000) Image processing : Digital image processing
(100.5070) Image processing : Phase retrieval

ToC Category:
Image Processing

History
Original Manuscript: October 4, 2013
Revised Manuscript: November 23, 2013
Manuscript Accepted: December 15, 2013
Published: January 16, 2014

Citation
Sudheesh K. Rajput and Naveen K. Nishchal, "Fresnel domain nonlinear optical image encryption scheme based on Gerchberg–Saxton phase-retrieval algorithm," Appl. Opt. 53, 418-425 (2014)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-53-3-418


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