Journal
CHAOS SOLITONS & FRACTALS
Volume 91, Issue -, Pages 639-648Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chaos.2016.08.014
Keywords
Chaos; Hash function; Variable parameters; Piecewise linear chaotic map; One-way coupled map lattice
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Funding
- National Natural Science Foundation of China [61402380, 61528206, 61672119]
- Natural Science Foundation of CQ CSTC [cstc2015jcyjA40044]
- Fundamental Research Funds for the Central Universities [XDJK2015B030]
- U.S. National Science Foundation [CNS-1253506, CNS-1618300]
- State Key Laboratory for Novel Software Technology [KFKT2016B13]
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We propose a chaotic hash algorithm based on circular shifts with variable parameters in this paper. We exploit piecewise linear chaotic map and one-way coupled map lattice to produce initial values and variable parameters. Circular shifts are introduced to improve the randomness of hash values. We evaluate the proposed hash algorithm in terms of distribution of the hash value, sensitivity of the hash value to slight modifications of the original message and secret keys, confusion and diffusion properties, robustness against birthday and meet-in-the-middle attacks, collision tests, analysis of speed, randomness tests, flexibility, computational complexity, and the results demonstrate that the proposed algorithm has strong security strength. Compared with the existing chaotic hash algorithms, our algorithm shows moderate statistical performance, better speed, randomness tests, and flexibility. (C) 2016 Elsevier Ltd. All rights reserved.
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