1. Guilin University of Electronic Technology,Guangxi Key Laboratory of Trusted Software,Guilin,China
2. Guilin University of Electronic Technology,Guangxi Key Laboratory of Cryptography and Information Security,Guilin,China
3. Nanyang Technological University,Strategic Centre for Research in Privacy-Preserving Technologies & Systems,Singapore
4. Guilin University of Electronic Technology,Guangxi Cloud Computing and Big Data Collaborative Innovation Center,Guilin,China