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Optical scrambling system for document authentication by image decryption

Abstract : The continuous development of new authentication techniques is necessary to prevent illegal data access from unauthorized users or counterfeiting. In this paper, we present a simple optical method to decode encrypted images using a multi-scopic optical system. The method uses a scrambled lens-let array which provides a high level of security. In a simple configuration, the encrypted image is scrolled in front of the multi-scopic imaging system. Due to a particular arrangement of lens-lets, the image will only be correctly imaged at a unique position with respect to the imager. Experimental demonstrations are presented and potential applications discussed.
Keywords : anti-counterfeiting
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Submitted on : Monday, November 15, 2021 - 11:44:03 AM
Last modification on : Friday, August 5, 2022 - 2:54:52 PM



M. Dejean, Vincent Nourrit, J.-L. de Bougrenet de La Tocnaye. Optical scrambling system for document authentication by image decryption. Optics Letters, 2020, 45 (2), pp.347. ⟨10.1364/OL.381297⟩. ⟨hal-03428728⟩



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