AskAJedi, I now have the security key app for iOS, registered on my account.
The EU one I got from:
The US one is apparently at:
Now registering it was interesting. The website was asking for a key from the authenticator app at some points, and others it wanted me to enter a value from the site into the app. Tip: the app serial code is in the Information tab on the app, click Security Key Information to see the serial.
Now I am all secure, so hopefully this time my account won't get hacked!