School of Computer and Software University of Information Science&Technology;
Wuxi Research Institute University of Information Science&Technology;
Engineering Research Center of Digital Forensics of Education Engineering Center of Network Monitoring;
Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology(CICAEET) University of Information Science&Technology;
School of Automation University of Information Science&Technology 210044;
Department of Electrical and Computer Engineering of Windsor 3P4;
School of Teacher Education University of Information Science&Technology;
Offline signatures; biometric verification; multi-path discrimination loss; attention mechanisms; inverse discrimination;