= Two Factor Authentication =
Two Factor Authentication ("2FA") or WebAuthn is supported by the OpenTHC tools. The [https://github.com/openthc/sso Single Sign On] service provides an integration for U2F and FIDO compatible devices.
These services have been tested with [https://solokeys.com/ SoloKeys]
Once an account is associated with a U2F device, then the account will always need that device to authenticate.
== Solo Key Setup ==
You may need to install the [https://docs.solokeys.io/solo/udev/ Solo UDEV] (do this before plugging in the device). And, depending on your version of UDEV you may need the new, or legacy rules.
Get https://github.com/solokeys/solo-python and make it.