Please use this identifier to cite or link to this item: https://doi.org/10.1364/AO.50.005750
Title: Optical double-image cryptography based on diffractive imaging with a laterally-translated phase grating
Authors: Chen, W. 
Chen, X. 
Sheppard, C.J.R. 
Issue Date: 10-Oct-2011
Source: Chen, W., Chen, X., Sheppard, C.J.R. (2011-10-10). Optical double-image cryptography based on diffractive imaging with a laterally-translated phase grating. Applied Optics 50 (29) : 5750-5757. ScholarBank@NUS Repository. https://doi.org/10.1364/AO.50.005750
Abstract: In this paper, we propose a method using structured-illumination-based diffractive imaging with a laterally- translated phase grating for optical double-image cryptography. An optical cryptosystem is designed, and multiple random phase-only masks are placed in the optical path. When a phase grating is laterally translated just before the plaintexts, several diffraction intensity patterns (i.e., ciphertexts) can be correspondingly obtained. During image decryption, an iterative retrieval algorithm is developed to extract plaintexts from the ciphertexts. In addition, security and advantages of the proposed method are analyzed. Feasibility and effectiveness of the proposed method are demonstrated by numerical simulation results. © 2011 Optical Society of America.
Source Title: Applied Optics
URI: http://scholarbank.nus.edu.sg/handle/10635/51000
ISSN: 00036935
DOI: 10.1364/AO.50.005750
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