Do you know where Security Keys are for sale in the EU and/or generally outside of the US? As far as I'm aware, Security Keys are not currently for sale outside of the US.
Perhaps Mr. Philip_BW could help with this?
If I remember right, they're talking about it for Europe... are they even back in the site Store for the U.S yet?
Hopefully you get an answer - one not phrased in 'duck' nonsense. Good to see he takes security questions seriously, isn't it?