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Title: Optical image encryption based on coherent diffractive imaging using multiple wavelengths
Authors: Chen, W. 
Chen, X. 
Sheppard, C.J.R. 
Keywords: Coherent diffractive imaging
Multiple wavelengths
Optical image encryption and decryption
Phase retrieval
Issue Date: 1-Feb-2012
Citation: Chen, W., Chen, X., Sheppard, C.J.R. (2012-02-01). Optical image encryption based on coherent diffractive imaging using multiple wavelengths. Optics Communications 285 (3) : 225-228. ScholarBank@NUS Repository.
Abstract: Coherent diffractive imaging is an optical technique in which the information of an object is encoded in the diffraction intensity using a single-path wave propagation strategy. In recent years, coherent diffractive imaging has attracted much attention in many fields due to its marked advantages, such as robustness to vibration and the suitability for various wavelengths. In this paper, we propose to apply coherent diffractive imaging using multiple wavelengths for optical image encryption. A light wavelength is tuned during the encryption, and a series of diffraction intensity maps (i.e., ciphertexts) is sequentially recorded in the Fresnel domain. During image decryption, an iterative retrieval algorithm is further developed, and cryptosystem security and robustness of the proposed method are also analyzed. Numerical simulation results are presented to demonstrate feasibility and effectiveness of the proposed method. © 2011 Elsevier B.V. All rights reserved.
Source Title: Optics Communications
ISSN: 00304018
DOI: 10.1016/j.optcom.2011.09.045
Appears in Collections:Staff Publications

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