1. School of Mathematics and Computational Science; Guilin University of Electronic Technology; Guilin 541004 China
2. Guangxi Key Laboratory of Cryptography and Information Security; Guilin University of Electronic Technology; Guilin 541004 China
3. Guangxi Colleges and Universities Key Laboratory of Data Analysis and Computation; Guilin University of Electronic Technology; Guilin 541004 China
4. School of Art and Design; Guilin University of Electronic Technology; Guilin 541004 China