Graduate Student Research Achievements Site | Ritsumeikan University

（Last updated : 2025-12-08 10:52:53）

YAMAGUCHI Shuji

Department / Course Ritsumeikan University Graduate School Graduate School of Information Science and Engineering Major in Information Science and Engineering

Job

Books and theses
Papers		A Framework for Enhancing Account Recovery Using Dynamically Generated Location-based Questions Journal of Information Processing 33,pp.631-645 (Co-authored) 2025/09/16
Papers		User Verification System using Location-based Dynamic Questions for Account Recovery 2024 IEEE Security and Privacy Workshops (SPW) (Co-authored) 2024/05/23
Papers		Enhancing Account Recovery with Location-based Dynamic Questions,pp.532-539 (Co-authored) 2023/10/24
Papers		Usability Analysis and Evaluation of WebAuthn-based Passwordless Biometric Authentication,pp.904-918 (Co-authored) 2023/04/17
Papers		Effective Classiﬁcation for Multi-modal Behavioral Authentication on Large-Scale Data Journal of Internet Technology 22 (5),pp.1171-1183 (Co-authored) 2021/09/30
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Academic background
2007/04/01～2009/03/31	Master Course Kyushu Institute of Technology Completed
2005/04/01～2007/03/31	Kyushu Institute of Technology Graduated
2000/04/01～2005/03/31	Mechanical Engineering Kure National College of Technology Graduated

Business career
2023/10/01 ～	Research Engineer LY Corporation LY Research
2009/04/01 ～ 2023/09/30	Research Engineer Yahoo Japan Corporation Yahoo Japan Research

Academic conference attendance and presentation
2025/10/28	Toward a Risk-based Multimodal FIDO Authenticator: Proposal and Empirical Evaluation of Keystroke Dynamics-Based Authentication (Computer Security Symposium 2025)

Research activities
	ACM
	IEEE CS

Present specialized field
keyword(Security, Identity Management, Authentication, Account Recovery, Location Data, Data Science)

Website
https://research.lycorp.co.jp/en/people/4