Computer Science ›› 2017, Vol. 44 ›› Issue (Z6): 356-360.doi: 10.11896/j.issn.1002-137X.2017.6A.081

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Image Encryption Scheme Based on Chaos with Parameter Perturbation

ZHU Shu-qin and LI Jun-qing   

  • Online:2017-12-01 Published:2018-12-01

Abstract: Due to the limitation of the numerical accuracy of the computer,the chaotic sequence will degenerate into the periodic sequence.An image encryption scheme based on chaotic system with parameter perturbation was proposed.Firstly,an existing chaotic system was improved to obtain a new chaotic system.Secondly,the new chaotic system was perturbed by the state variables of the existing chaotic systems,so that Chaotic system with parameter perturbation can be produced.In the encryption scheme,the number of iterations is controlled by the feedback of the cipher text and the key stream is generated dynamically.Experimental results and security analysis show that the algorithm is sensitive to the key and has a large key space,the encrypted image has good statistical properties and the encrypted image is very sensitive to the plain image,and the algorithm can resist the attack of choosing plain or cipher text.

Key words: Marotto theorem,Chaotic encryption,Parameter perturbation,Cipher text feedback

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