期刊
INTERNATIONAL JOURNAL OF BIFURCATION AND CHAOS
卷 28, 期 5, 页码 -出版社
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S0218127418500591
关键词
Chaos; digital chaotic map; dynamical degradation; coupling; PRBG
资金
- National Natural Science Foundation of China [61601215, 61603175]
- Science AMP
- technology research project of Education Department of Jiangxi Province [GJJ150104]
- State Key Laboratory of Cryptology Open Research Fund Project [MMKFKT201613]
- Huazhong University of Science AMP
- Technology Independent Innovation Fund [2016YXMS067]
A chaotic map which is realized on a computer will suffer dynamical degradation. Here, a coupled chaotic model is proposed to reduce the dynamical degradation. In this model, the state variable of one digital chaotic map is used to control the parameter of the other digital map. This coupled model is universal and can be used for all chaotic maps. In this paper, two coupled models (one is coupled by two logistic maps, the other is coupled by Chebyshev map and Baker map) are performed, and the numerical experiments show that the performances of these two coupled chaotic maps are greatly improved. Furthermore, a simple pseudorandom bit generator (PRBG) based on coupled digital logistic maps is proposed as an application for our method.
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