Open AccessDouble image encryption based on random phase encoding in the fractional Fourier domain
Author(s) -
Ran Tao,
Yi Xin,
Yue Wang
Publication year - 2007
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.15.016067
Subject(s) - scrambling , encryption , computer science , pixel , image quality , fourier transform , encoding (memory) , algorithm , image (mathematics) , white noise , optics , phase retrieval , frequency domain , image processing , computer vision , artificial intelligence , physics , mathematics , telecommunications , mathematical analysis , operating system
A novel image encryption method is proposed by utilizing random phase encoding in the fractional Fourier domain to encrypt two images into one encrypted image with stationary white distribution. By applying the correct keys which consist of the fractional orders, the random phase masks and the pixel scrambling operator, the two primary images can be recovered without cross-talk. The decryption process is robust against the loss of data. The phase-based image with a larger key space is more sensitive to keys and disturbances than the amplitude-based image. The pixel scrambling operation improves the quality of the decrypted image when noise perturbation occurs. The novel approach is verified by simulations.