Telecommunications Science ›› 2016, Vol. 32 ›› Issue (11): 93-100.doi: 10.11959/j.issn.1000-0801.2016286

• research and development • Previous Articles     Next Articles

Chaotic image encryption algorithm based on single image local scrambling and dynamic feedback diffusion

Yeqin CUI1,Guochao DING2   

  1. 1 College of Mathematics and Information Science,Langfang Normal University,Langfang 065000,China
    2 College of Information Technology,Heilongjiang Bayi Agricultural University,Daqing 163319,China
  • Online:2016-11-20 Published:2017-06-05
  • Supported by:
    The National Natural Science Foundation of China;Natural Science Foundation of Heilongjiang Province of China;Science and Technology Project of Education Department of Heilongjiang Province of China

Abstract:

A novel chaotic image encryption algorithm based on single image local scrambling and dynamic feedback diffusion was presented.Firstly,a single image local scrambling algorithm was proposed.Secondly,a novel dynamic feedback diffusion strategy was proposed to change the pixel values of the scrambled image in the phase of diffusion,by which improved the results of image encryption.Finally,the simulation results and performance analysis show that the number pixels change rate(NPCR)values and unified average changing intensity(UACI)values of the proposed algorithm can be close to 99.6% and 33.4%,showing that the proposed algorithm has better resistance to differential attacks and saves time compared with the other three classic algorithms.

Key words: chaotic theory, image encryption, scrambling, dynamic feedback, diffusion

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