Journal of South China University of Technology (Natural Science Edition) ›› 2013, Vol. 41 ›› Issue (6): 53-62.doi: 10.3969/j.issn.1000-565X.2013.06.010

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

Image Encryption Algorithm Based on Quantum Logistic Map in Wavelet Domain

Luo Yu- ling Du Ming- hui   

  1. School of Electronic and Information Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2012-10-10 Revised:2012-12-12 Online:2013-06-25 Published:2013-05-03
  • Contact: 罗玉玲(1984-)，女，博士生，主要从事混沌密码学及图像处理研究． E-mail:luo.yuling@mail.scut.edu.cn
  • About author:罗玉玲(1984-)，女，博士生，主要从事混沌密码学及图像处理研究．
  • Supported by:

    国家自然科学基金资助项目(60972133);广东省自然科学基金团队项目(9351064101000003);华南理工大学中央高校基本科研业务费专项资金资助项目(X2dXD2116370)

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Abstract:

In order to improve the safety and efficiency of image encryption algorithms,a new adaptive algorithm based on quantum Logistic map and 2D discrete wavelet transform (DWT),which combines confusion and diffu-sion,is proposed.In this algorithm,first,the original image is decomposed into low- pass subband and high- pass subband coefficients via the DWT,and the low- pass ones are sorted out by using the quantum Logistic map with random sequences,followed by an inverse DWT to obtain a shuffled image. Then,each pixel of the shuffled image is mixed with the chaotic sequence generated by the quantum Logistic system,and the quantum Logistic system is perturbed to substitute for pixel values adaptively.Thus,better diffusion effect is achieved.Experimental results and performance analysis demonstrate that the proposed algorithm is of large key space,high security and high operation speed,etc.,and that it helps to obtain cipher images with random gray distribution.

Key words: information security, image encryption, discrete wavelet transform, chaos theory, quantum Logistic map

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