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Liquid surface oscillations for a time-dependent random-phase security system
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Paper Abstract

A novel optical encryption technique that uses oscillations on a liquid lens surface and random phase masks to encode images is presented. Excited liquid surface patterns can encode optical wave fronts, making the optical transfer function of the system a function of time. This allows for possible protection against known and chosen plaintext attacks and potentially enables more flexible realizations of random phase mask security systems. However, the periodic nature of liquid surface oscillations and the geometry of the patterns can potentially place constraints on the efficacy of such a system. Simulation results show that the entropy of encrypted images depends on the liquid surface mode shape and the recording duration of the encrypted image. Additionally, it is shown that mistiming the liquid system during decryption gives significant error in the recovered images. The simulations presented here use a model of a commercial available liquid lens, giving the possibility for future comparison with experimental results.

Paper Details

Date Published: 29 January 2018
PDF: 8 pages
Proc. SPIE 10559, Broadband Access Communication Technologies XII, 1055908 (29 January 2018); doi: 10.1117/12.2291299
Show Author Affiliations
David R. Schipf, Univ. of Washington (United States)
Wei-Chih Wang, Univ. of Washington (United States)
National Tsing Hua Univ. (Taiwan)


Published in SPIE Proceedings Vol. 10559:
Broadband Access Communication Technologies XII
Benjamin B. Dingel; Katsutoshi Tsukamoto; Spiros Mikroulis, Editor(s)

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