Deficiencies of the cryptography based on multiple-parameter fractional Fourier transform.

@article{Ran2009DeficienciesOT,
  title={Deficiencies of the cryptography based on multiple-parameter fractional Fourier transform.},
  author={Q. W. Ran and Haiying Zhang and Jin Zhang and Liying Tan and Jing Ma},
  journal={Optics letters},
  year={2009},
  volume={34 11},
  pages={1729-31}
}
Methods of image encryption based on fractional Fourier transform have an incipient flaw in security. We show that the schemes have the deficiency that one group of encryption keys has many groups of keys to decrypt the encrypted image correctly for several reasons. In some schemes, many factors result in the deficiencies, such as the encryption scheme based on multiple-parameter fractional Fourier transform [Opt. Lett.33, 581 (2008)]. A modified method is proposed to avoid all the deficiencies… CONTINUE READING

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