We propose a new image encryption algorithm based on a generalized fractional Fourier transform, to which we refer as a multifractional Fourier transform. We encrypt the input image simply by performing the multifractional Fourier transform with two keys. Numerical simulation results are given to verify the algorithm, and an optical implementation setup is also suggested.
© 2000 Optical Society of America
(070.2590) Fourier optics and signal processing : ABCD transforms
(070.6020) Fourier optics and signal processing : Continuous optical signal processing
(200.3050) Optics in computing : Information processing
Banghe Zhu, Shutian Liu, and Qiwen Ran, "Optical image encryption based on multifractional Fourier transforms," Opt. Lett. 25, 1159-1161 (2000)