Pivot: Panoramic-Image-Based VR User Authentication against Side-Channel Attacks. - Gui Xiao; Zhen Ling 001; Qunqun Fan; Xiangyu Xu 001; Wenjia Wu; Ding Ding 002; Chen Chen; Xinwen Fu (ACM Trans. Multim. Comput. Commun. Appl., 2025)