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Opt Lett. 2008 Mar 15;33(6):581-3.

Optical image encryption based on the multiple-parameter fractional Fourier transform.

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  • 1Department of Electronic Engineering, Beijing Institute of Technology, Beijing, 100081, China.


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.

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