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Yasmin Abdrabou, Johannes Schuette, Ahmed Shams, Ken Pfeuffer, Daniel Buschek, Mohamed Khamis, Florian Alt
"Your Eyes Say You Have Used This Password Before": Identifying Password Reuse from Gaze Behavior and Keystroke Dynamics
In CHI â22: Proceedings of the 2022 CHI Conference on Human Factors in Computing Systems. May 03, 2022. Association for Computing Machinery, New York, NY, USA. (bib)

A significant drawback of text passwords for end-user authentication is password reuse. We propose a novel approach to detect password reuse by leveraging gaze as well as typing behavior and study its accuracy. We collected gaze and typing behavior from 49 users while creating accounts for 1) a webmail client and 2) a news website. While most participants came up with a new password, 32% reported having reused an old password when setting up their accounts. We then compared different ML models to detect password reuse from the collected data. Our models achieve an accuracy of up to 87.7% in detecting password reuse from gaze, 75.8% accuracy from typing, and 88.75% when considering both types of behavior. We demonstrate that \revisedusing gaze, password reuse can already be detected during the registration process, before users entered their password. Our work paves the road for developing novel interventions to prevent password reuse.