Journal of South China University of Technology (Natural Science Edition) ›› 2010, Vol. 38 ›› Issue (5): 27-33.doi: 10.3969/j.issn.1000-565X.2010.05.006

• Electronics, Communication & Automation Technology • Previous Articles     Next Articles

Image Encryption Algorithm Based on Reciprocally-Disordered Diploid Chaotic Sequences Alternated in Subsection

Chen Yan-feng  Li Yi-fang   

  1. School of Electronic and Information Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2009-04-16 Revised:2009-06-04 Online:2010-05-25 Published:2010-05-25
  • Contact: 陈艳峰（1970-），女，副教授，主要从事非线性电路系统理论、功率电子学及混沌保密通信研究． E-mail:eeyfchen@scut．edu．cn
  • About author:陈艳峰（1970-），女，副教授，主要从事非线性电路系统理论、功率电子学及混沌保密通信研究．
  • Supported by:

    国家自然科学基金资助项目（60802004）; 中央高校基本科研业务费专项资金资助项目（2009ZM0011）

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Abstract:

As the image encryption based on chaos is of high security and adaptability,this paper analyzes the security of the conventional image encryption algorithms based on chaotic systems and proposes a new image encryption algorithm based on diploid Logistic and Chebyshev chaotic maps.The auxiliary and the initial secret keys based on original image,as well as the reciprocally-disordered cipher sequences alternated in subsection and generated by the diploid chaotic systems,are the kernel parts of the proposed algorithm.Both the simulated and statistical results and the security analysis show that the proposed algorithm is of excellent encryption effect and high security,with a key space being up to 255×10120.

Key words: chaotic systems, encryption, auxiliary key, order-disorder