- This option should only be used if you don't have the ability to use a mobile device.
- U2F token authentication only works in the Chrome and Opera browser.
- Fobs can be purchased individually from 3rd party vendors
- Duo supports third-party hardware tokens, such as YubiKeys or any OATH HOTP-compatible tokens
- No special drivers required; all that is needed is a supported web browser, operating system and a U2F device
- See this FAQ for instructions on configuring the fob
- Fobs should be configured for only one account and should not be shared