Funding for this research was provided by:
National Natural Science Foundation of China (61772215)
MOE Layout Foundation of Humanities and Social Sciences (20YJAZH102)
Foundation of Guangxi Key Laboratory of Cryptography and Information Security (GCIS201908)
Doctoral Talent Training Project of Chongqing University of Posts and Telecommunications (BYJS202008)
Article History
Received: 29 January 2021
Accepted: 24 May 2021
First Online: 7 June 2021
Declarations
:
: The authors declare that they have no conflict of interest.