A chaos-based symmetric image encryption scheme using a bit-level permutation

  • Authors:
  • Zhi-liang Zhu;Wei Zhang;Kwok-wo Wong;Hai Yu

  • Affiliations:
  • Software College, Northeastern University, No. 11, Lane 3, WenHua Road, Shenyang, Liaoning, China;College of Information Science and Engineering, Northeastern University, No.11, Lane 3, WenHua Road, Shenyang, Liaoning, China;Department of Electronic Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon Tong, Hong Kong;Software College, Northeastern University, No. 11, Lane 3, WenHua Road, Shenyang, Liaoning, China

  • Venue:
  • Information Sciences: an International Journal
  • Year:
  • 2011

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Abstract

In recent years, a variety of chaos-based digital image encryption algorithms have been suggested. Most of these algorithms implement permutations and diffusions at the pixel level by considering the pixel as the smallest (atomic) element of an image. In fact, a permutation at the bit level not only changes the position of the pixel but also alters its value. Here we propose an image cryptosystem employing the Arnold cat map for bit-level permutation and the logistic map for diffusion. Simulations have been carried out and analyzed in detail, demonstrating the superior security and high efficiency of our cryptosystem.