Computer Science ›› 2015, Vol. 42 ›› Issue (4): 136-140.doi: 10.11896/j.issn.1002-137X.2015.04.027

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Algorithm of Digital Image Encrypting Based on Multi-chaotic Sequence Generated by Rational Bézier Surface

ZHANG Yong-hong   

  • Online:2018-11-14 Published:2018-11-14

Abstract: In this paper,an implementation of digital image encryption scheme based on the multi-chaotic system genera-ted by rational Bézier surface was proposed.Firstly,many initial conditions of Logistic chaotic system are generated by using the external secret key of 8t-bit,and many Logistic chaotic sequences are generated.Then the multi-chaotic matrix is generated based on rational Bézier surface.Secondly,the XOR operation between plain-image and chaotic matrix is applied.Finally,the chaotic address set is generated by using the multi-chaotic matrix,and then the permutation is given by using this chaotic address set.The algorithm has the advantage that both diffusion and scrambling are operated by using the multi-chaotic sequence.The results of several experimental,statistical analysis and key sensitivity tests show that the proposed image encryption scheme provides an efficient and secure way for real-time image encryption and transmission.

Key words: Digital image,Encryption,Chaos map,Rational Bézier surface,Statistical analysis

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