YI-NING LIU1, WEI GUO1, CHI CHENG2, CHINGFANG HSU3,
JUN-YAN QIAN1 AND CHANG-LU LIN4
1Guangxi Key Lab of Trusted Software
Guilin University of Electronic Technology
Guilin, 541004 P.R. China
2School of Computer Science
China University of Geosciences
Wuhan, 430074 P.R. China
3Computer School
Central China Normal University
Wuhan, 430079 P.R. China
4College of Mathematics and Computer Science
Fujian Normal University
Fuzhou, 350117 P.R. China
E-mail: ynliu@guet.edu.cn