Funding for this research was provided by:
National Natural Science Foundation of China (61672124)
Password Theory Project of the 13th Five-Year Plan National Cryptography Development Fund (MMJJ20170203)
Liaoning Province Science and Technology Innovation Leading Talents Program Project (XLYC1802013)
Key R&D Projects of Liaoning Province (2019020105-JH2/103)
Jinan City ’20 universities’ Funding Projects Introducing Innovation Team Program (2019GXRC031)
Article History
First Online: 10 August 2020
Compliance with ethical standards
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: The authors declare that they have no conflict of interest.