title: Optical image encryption based on the multiple-parameter fractional Fourier transform.
abstract: A novel image encryption algorithm is proposed based on the multiple-parameter fractional Fourier transform, which is a generalized fractional Fourier transform, without the use of phase keys. The image is encrypted simply by performing a multiple-parameter fractional Fourier transform with four keys. Optical implementation is suggested. The method has been compared with existing methods and shows superior robustness to blind decryption.
authors.affiliation: Department of Electronic Engineering, Beijing Institute of Technology, Beijing, 100081, China. rantao@bit.edu.cn
authors.forename: Ran
authors.initials: R
authors.lastname: Tao
authors.forename: Jun
authors.initials: J
authors.lastname: Lang
authors.forename: Yue
authors.initials: Y
authors.lastname: Wang