Abstract
This paper proposes a novel seven-dimensional fractional-order chaotic system applied to secure communication. First, a seven-dimensional fractional order system is constructed by selecting an arbitrary fractional order q. Then, the chaotic and non-chaotic dynamic behaviors of the system are analyzed by 0–1 Test, and the correctness is verified by phase diagram comparison and complexity analysis. Then, the corresponding fractional-order chaotic circuit is designed, and the phase image which is basically consistent with the experimental simulation results is obtained. Finally, the seven-dimensional fractional-order chaotic system is used to complete the signal encryption and decryption test to achieve secure communication. This indicates that the seven-dimensional fractional-order chaotic system proposed to this paper has more complex dynamic characteristics and can be used for secure communication.

















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Acknowledgements
This work was supported by the China Postdoctoral Science Foundation funded project No. 2017M622574. Chinese National Natural Science Foundation No. 61973109, Hunan University of Science and Technology Student Research Innovation Program (SRIP) under Grant SZZ2019006.
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Peng, Z., Yu, W., Wang, J. et al. Dynamic analysis of seven-dimensional fractional-order chaotic system and its application in encrypted communication. J Ambient Intell Human Comput 11, 5399–5417 (2020). https://doi.org/10.1007/s12652-020-01896-1
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DOI: https://doi.org/10.1007/s12652-020-01896-1