1. Beijing Key Laboratory of Trusted Computing, Faculty of Information Technology, Beijing University of Technology, Beijing, China
2. Faculty of Information Technology, Beijing University of Technology, Beijing, China
3. Beijing Trusty Cloud Technology Company Ltd., Beijing, China
4. China Cybersecurity Review Technology and Certification Center, Beijing, China
5. James Watt School of Engineering, University of Glasgow, Glasgow, U.K.
6. Faculty of Engineering and Science, School of Computing and Mathematical Sciences, University of Greenwich, London, U.K.
7. School of Electronics and Computer Science, University of Southampton, Southampton, U.K.