Pin Lin1,3, Wenling Wu1, Chuankun Wu1 and Tian Qiu2,3
1The State Key Laboratory of Information Security
Institute of Software
Chinese Academy of Sciences
2National Key Laboratory of Integrated Information System Technology
3Graduate School of Chinese Academy of Sciences
Beijing 100190, P.R. China
E-mail: ping_linux@163.com
E-mail: {wwl; ckwu}@is.iscas.ac.cn; qiutian@ios.cn