1. Key Laboratory of Aerospace Information Security and Trusted Computing Ministry of Education, School of Cyber Science and Engineering, Wuhan University, Wuhan, China
2. School of Cyber Science and Engineering, Wuhan University, Wuhan, China
3. Department of Information Systems and Cyber Security, University of Texas at San Antonio, San Antonio, TX, USA
4. Key Laboratory of Cryptography of Zhejiang Province, Hangzhou Normal University, Hangzhou, China