Using wavefront coding technique as an optical encryption system: reliability analysis and vulnerabilities assessment

Mikhail V. Konnik

doi:10.1117/12.918739

23 April 2012 Using wavefront coding technique as an optical encryption system: reliability analysis and vulnerabilities assessment

Mikhail V. Konnik

Author Affiliations +

Proceedings Volume 8398, Optical Pattern Recognition XXIII; 83980R (2012) https://doi.org/10.1117/12.918739
Event: SPIE Defense, Security, and Sensing, 2012, Baltimore, Maryland, United States

Abstract

Wavefront coding paradigm can be used not only for compensation of aberrations and depth-of-field improvement but also for an optical encryption. An optical convolution of the image with the PSF occurs when a diffractive optical element (DOE) with a known point spread function (PSF) is placed in the optical path. In this case, an optically encoded image is registered instead of the true image. Decoding of the registered image can be performed using standard digital deconvolution methods. In such class of optical-digital systems, the PSF of the DOE is used as an encryption key. Therefore, a reliability and cryptographic resistance of such an encryption method depends on the size and complexity of the PSF used for optical encoding. This paper gives a preliminary analysis on reliability and possible vulnerabilities of such an encryption method. Experimental results on brute-force attack on the optically encrypted images are presented. Reliability estimation of optical coding based on wavefront coding paradigm is evaluated. An analysis of possible vulnerabilities is provided.

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Mikhail V. Konnik "Using wavefront coding technique as an optical encryption system: reliability analysis and vulnerabilities assessment", Proc. SPIE 8398, Optical Pattern Recognition XXIII, 83980R (23 April 2012); https://doi.org/10.1117/12.918739

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KEYWORDS

Point spread functions

Image encryption

Diffractive optical elements

Computer programming

Digital imaging

Image quality

Reliability

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