Abstract
We propose an optical encryption technique where the encrypted field and the decrypting key are obtained by three-step phase-shifting interferometry and registered as digital Fresnel holograms in a joint transform correlator architecture. Decryption can be achieved by digital or optical means. The technique allows the complete process to be achieved at high speed and data to be transfered via digital communication channels. Experimental implementation is performed in a system based on a programmable liquid-crystal TV display working in pure phase mode to represent the input data and to introduce the required phase shifts. A CCD is used to register the output data.
© 2006 Optical Society of America
Full Article | PDF ArticleMore Like This
Dong-Hoan Seo, Chang-Mok Shin, and Soo-Joong Kim
Appl. Opt. 43(20) 4011-4016 (2004)
Enrique Tajahuerce, Osamu Matoba, Steven C. Verrall, and Bahram Javidi
Appl. Opt. 39(14) 2313-2320 (2000)
Dafne Amaya, Myrian Tebaldi, Roberto Torroba, and Néstor Bolognini
Appl. Opt. 48(11) 2099-2104 (2009)