You can do both TOTP and U2F on an yubikey. U2F is much harder to trick.. And TOTP on your phone is likely to get hacked. TOTP on a physical yubikey is a much

You can do both TOTP and U2F on an yubikey. U2F is much harder to trick.. And TOTP on your phone is likely to get hacked. TOTP on a physical yubikey is a much harder target.