Fenghua Li received his B.S. degree in Computer Software and his M.S. and Ph.D. degrees in Computer Systems Architecture from Xidian University in 1987, 1990 and 2009 respectively. Currently, he is working as a professor and doctoral supervisor at the Institute of Information Engineering, Chinese Academy of Sciences. He is also a doctoral supervisor at Xidian University and at the University of Science and Technology of China. His research interests are in the areas of network security, privacy computing, system security and data security. He has published more than 150 papers and won the State Technological Invention Award (the Second Prize)of China in 2020. Hui Li received his B.S. degree from Fudan University in 1990 and his M.S. and Ph.D. degrees from Xidian University in 1993 and 1998. Since 2005, he has been a professor at the School of Cyber Engineering, Xidian University, Xi’an Shaanxi, China. His research interests are in the areas of cryptography, privacy computing, and information theory. He was the chair of ACM SIGSAC CHINA from 2016 to 2020 and has published more than 300 papers. Ben Niu received his B.S. degree in Information Security and his M.S. and Ph.D. degrees in Cryptography from Xidian University in 2006, 2010 and 2014 respectively. Currently, he is working as an associate professor and doctoral supervisor at the Institute of Information Engineering, Chinese Academy of Sciences, Beijing, China. He was a visiting scholar at Pennsylvania State University from 2011 to 2013. His main research interest is in privacy computing. He has published more than 60 papers.