Cyber security 17th China Annual Conference, CNCERT 2020, Beijing, China, August 12, 2020 : revised selected papers - Lu, Wei; Wen, Qiaoyan; Zhang, Yuqing; Lang, Bo; Wen, Weiping; Yan, Hanbing; Li, Chao; Ding, Li; Li, Ruiguang; Zhou, Yu (Springer, 2020)