Open AccessOptical binary image encryption using aperture-key and dual wavelengths
Author(s) -
Xiaogang Wang,
Wen Chen,
Xudong Chen
Publication year - 2014
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.028077
Subject(s) - encryption , computer science , optics , image quality , phase retrieval , holography , key (lock) , binary number , binary data , aperture (computer memory) , transmission (telecommunications) , image (mathematics) , computer vision , physics , telecommunications , fourier transform , mathematics , computer network , computer security , arithmetic , quantum mechanics , acoustics
We described a method where the secret binary image that has been encoded into a single amplitude pattern in Fresnel domain can be recovered based on phase retrieval with an aperture-key and wavelength keys, and no holographic recording is needed in the encryption. The predesigned aperture-key not only realizes the intensity modulation of the encrypted image, but also helps to retrieve the secret image with high quality. All the necessary decryption keys can be kept in digital form that facilitates data transmission and loading in image retrieval process. Numerical simulation results are given for testing the validity and security of the proposed approach.