Service Description For security, SF State protects sensitive data using two-factor authentication (2FA). If you receive an unexpected 2FA approval request, change your password immediately as it is a good sign that your password is compromised. Request a token for user with Duo two-factor authentication Report a lost or stolen device with access to Duo authentication Two-Factor Authentication (2FA) Guide Eligibility Student Faculty Staff Community Member Helpful Links Two-Factor Authentication (2FA) Frequently Asked Questions (FAQ) What is Two-Factor Authentication? (Duo video) Duo's Guide to Two-Factor Authentication Duo's YouTube Channel Two-Factor Authentication (2FA) Guide