Optical image encryption based on the multiple-parameter fractional Fourier transform.
Optical image encryption based on the multiple-parameter fractional Fourier transform.
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.
Tao R, Lang J, Wang Y.