The us government is rolling this out as well: https://login.gov
They are an incredible product of the USDS, 18F, and GSA and it’s awesome watching them slowly but surely make digital identity with the US government better.
https://gds.blog.gov.uk/2015/07/29/same-but-different-a-comm...
Whereas in the UK to access gov.uk with Security Keys I have to use a third party (Digidentity) because the government out-sourced this problem.
Kudos to the login.gov team.