Lingfeng Qu received the Ph.D. degree from Southwest Jiaotong University, Chengdu, China, in 2023. From 2022 to 2023, he received funding from the China Scholarship Council for joint training in Christian Doppler Laboratory ATHENA, Institute of Information Technology (ITEC), University of Klagenfurt, Austria. He is currently working in the Cyberspace Institute of Advanced Technology, Guangzhou University, Guangzhou, P.R.China. His main research interests include image processing and reversible data hiding in encrypted domain.