Journal of Guangxi Normal University(Natural Science Edition) ›› 2021, Vol. 39 ›› Issue (6): 72-86.doi: 10.16088/j.issn.1001-6600.2020121603

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Multi-layer Interactive Color Image Encryption Algorithm Based on Chaotic Map

LI Lanhang1, QIU Senhui1*, WANG Wenyi2*, XIAO Dingwei1, LUO Yuling1   

  1. 1. School of Electronic Engineering, Guangxi Normal University, Guilin Guangxi 541004, China;
    2. Department of Physics and Engineering Technology, Guilin Normal College, Guilin Guangxi 541199, China
  • Received:2020-12-16 Revised:2021-04-22 Online:2021-11-25 Published:2021-12-08

Abstract: A new color image encryption algorithm based on a coupled chaotic map is presented. Firstly, the initial secret keys are produced by combining the information which is extracted from plain image and external keys. Secondly, the color image is decomposed into three components of R, G, and B, and three one-dimensional sequences are obtained at the same time. The elements in each sequence are grouped and scrambled. Then, three index sequences are constructed by using the pseudo-random sequences generated by the chaotic map, and the three components of R, G, and B are sequentially scrambled by using the index sequences again; the final cipher image is obtained according to xor operation. Experimental results and security analysis prove that the encryption scheme has a good encryption effect as it can resist common cryptanalysis attacks, such as statistical analysis attack, differential attack, cropping attack and noise attack, etc. In addition, compared with other literatures, the results show that the cipher image information entropy obtained by this scheme is closer to the ideal value of 8, the correlation coefficient is closer to 0, and the encryption efficiency is higher than other schemes.

Key words: image encryption, chaotic map, permutation, diffusion, cryptanalysis attack

CLC Number: 

  • TP309.7
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