Also, I'd recommend using the word "security key" somewhere there and even the term U2F. I've been spreading their gospel for a long time and it helps to name it like that, for people to be able to find exactly what they need, and read the appropriate help page.
-
-
-
Yubikey doesn't pull up the same help, etc on all platforms but security key or U2F almost always does, as well as Yubikey.
End of conversation
New conversation -
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.