An enhanced variable-length arithmetic coding and encryption scheme using chaotic maps

  • Authors:

  • Qiuzhen Lin;Kwok-Wo Wong;Jianyong Chen

  • Affiliations:

  • Department of Electronic Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon Tong, Hong Kong;Department of Electronic Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon Tong, Hong Kong;Shenzhen City Key Laboratory of Embedded System Design, College of Computer Science and Software Engineering, Shenzhen University, Shenzhen 518060, China

  • Venue:
  • Journal of Systems and Software
  • Year:
  • 2013

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Abstract

We enhance the simultaneous arithmetic coding and encryption scheme previously proposed by us. By encoding a block of variable number of symbols to a codeword within the length of the computation register, the operating efficiency has been substantially improved. Moreover, the compressed sequence is processed by an additional diffusion operation which strengthens the security of the original scheme by having higher key and plaintext sensitivities. Simulation results show that the enhanced scheme runs faster than the original scheme and the traditional compress-then-encrypt approach at a comparable compression performance.