1. Security Technology Research Institute, China Telecom Research Institute, Shanghai, China
2. Data61, CSIRO, Marsfield, NSW, Australia
3. Key Laboratory of Universal Wireless Communications, Beijing University of Posts and Telecommunications, Beijing, China
4. Security Technology Research Institute, China Telecom Research Institute, Guangzhou, China
5. School of Electrical and Information Engineering, The University of Sydney, Camperdown, NSW, Australia