Explore a comprehensive analysis of two-factor authentication (2FA) methods in this 22-minute conference talk from USENIX SOUPS 2019. Delve into a two-week usability study comparing five common 2FA techniques, examining both quantitative and qualitative data from 72 participants who simulated daily banking website logins. Discover user perceptions, preferences, and challenges associated with various 2FA methods. Learn about an additional laboratory study assessing the setup procedures for these authentication techniques. Gain insights into the learnability, user satisfaction, and potential limitations of different 2FA approaches. Understand the implications for improving account security and user experience in sensitive online environments.