Optoelectronic information encryption with phase-shifting interferometry

A technique that combines the high speed and the high security of optical encryption with the advantages of electronic transmission, storage, and decryption is introduced. Digital phase-shifting interferometry is used for efficient recording of phase and amplitude information with an intensity recor...

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Published in:Applied optics (2004) 2000-05, Vol.39 (14), p.2313-2320
Main Authors: Tajahuerce, E, Matoba, O, Verrall, S C, Javidi, B
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Language:English
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container_title Applied optics (2004)
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creator Tajahuerce, E
Matoba, O
Verrall, S C
Javidi, B
description A technique that combines the high speed and the high security of optical encryption with the advantages of electronic transmission, storage, and decryption is introduced. Digital phase-shifting interferometry is used for efficient recording of phase and amplitude information with an intensity recording device. The encryption is performed by use of two random phase codes, one in the object plane and another in the Fresnel domain, providing high security in the encrypted image and a key with many degrees of freedom. We describe how our technique can be adapted to encrypt either the Fraunhofer or the Fresnel diffraction pattern of the input. Electronic decryption can be performed with a one-step fast Fourier transform reconstruction procedure. Experimental results for both systems including a lensless setup are shown.
doi_str_mv 10.1364/AO.39.002313
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title Optoelectronic information encryption with phase-shifting interferometry
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