Computer Science ›› 2018, Vol. 45 ›› Issue (11A): 393-397.

• Information Security • Previous Articles     Next Articles

Double Chaotic Image Encryption Algorithm Based on Fractional Transform

WANG Le-le, LI Guo-dong   

  1. School of Mathematics,Xinjiang University of Finance and Economics,Urumqi 830012,China
  • Online:2019-02-26 Published:2019-02-26

Abstract: Image encryption plays an important role in daily life.Aiming at the problem of low security of traditional natural chaos system,an improved image encryption algorithm based on H-L double chaos and fractional Fourier transformwas proposed.Based on the order of the optimal solution sequence solved by the exhaustive method,the chaotic map is combined with the fractional Fourier transform.At the same time,it combines with the fractional Fourier transform to realize the scrambling in the spatial and the frequency domains,so that the plain text information is hidden.The simulation results show that the improved algorithm achieves good encryption effect,large key space,low computational complexity,strong sensitivity and effective anti-statistical attack performance.It has certain value in the aspect of gra-phic information security.

Key words: Backpack problem, Chaotic encryption, DCT, Fractional Fourier, Image encryption

CLC Number: 

  • TP309
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