Explore Facebook's internal multi-factor authentication platform in this 34-minute conference talk from Security @ Scale 2014. Gain insights from John "Four" Flynn, Security Engineering Manager at Facebook, as he delves into the design challenges, goals, and solutions implemented for enhancing internal infrastructure security. Learn about the innovative approaches to SSH, biometrics, smartcards, and SFTP, as well as the importance of SSH logs and session keys in strengthening security measures. Discover how Facebook addressed unique security needs for its engineers and the lessons learned from this implementation.