A self-updating digital chaotic stream cipher

Jin Zhong, Dong Jiang, Qi-Guo Huang () and Yang Cao ()
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Jin Zhong: College of Computer Science and Technology, Hefei Normal University, Hefei 230601, P. R. China†College of Computer Science and Technology, China University of Science and Technology, Hefei 230026, P. R. China
Dong Jiang: #x2021;State Key Laboratory for Novel Software Technology, Nanjing University, Nanjing 210046, P. R. China
Qi-Guo Huang: #x2021;State Key Laboratory for Novel Software Technology, Nanjing University, Nanjing 210046, P. R. China
Yang Cao: #xA7;Department of Electrical and Electronic Engineering, Xi’an Jiaotong-Liverpool, University, Suzhou 215123, P. R. China

International Journal of Modern Physics C (IJMPC), 2018, vol. 29, issue 08, 1-22

Abstract: Chaotic cryptography has been extensively investigated over the past three decades, especially in the field of digital chaotic cryptography. In this paper, we propose a new digital chaotic stream cipher based on double piecewise linear chaotic maps. It initially takes four real numbers as the key, periodically updates the chaotic maps, and efficiently outputs the bit strings. Theoretical analysis shows that our protocol achieves higher anti-cryptanalysis capacities, effectively alleviates the dynamical degradation problem, and thus reaches higher security. Statistical evaluation demonstrates that our protocol can generate bit strings with outstanding statistical properties. In addition, we apply our protocol to image encryption and decryption. Experimental results verify the conclusions of the statistical evaluation, and prove the strong sensitivity of the protocol to the key.

Keywords: Chaotic cryptography; digital chaotic stream cipher; dynamical degradation (search for similar items in EconPapers)
Date: 2018
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DOI: 10.1142/S0129183118500742

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