Optical implementation of image encryption using random phase encoding
Luiz Gonc¸alves Neto · Optical Engineering · 1996
In the optical implementation of image encryption using ran- dom phase encoding proposed by Refregier and Javidi the random phase mask is not band limited. Speckle noise can thus destroy optical reconstruction of the encrypted images. We demonstrate encryption of speckle-free kinoforms by smoothed random phase masks. Optical veri- fication of the encrypted images is shown. © 1996 Society of Photo-Optical