> This specification provides an API enabling a website to request a users federated credentials from a user agent, and to help the user agent store the users f

> This specification provides an API enabling a website to request a users federated credentials from a user agent, and to help the user agent store the users federated credentials for future use. It would be nice if creating an account on a new website was as simple as a couple of clicks, and didn't require providing any personal information or anything linkable between sites. I suspect, though, that websites (Relying Parties) will want some sort of guarantee that only one account per meatspace human is created on their site, to prevent Sybil attacks, and that might lead to there being just a short whitelist of acceptable Identity Providers (as is currently the case for much of the web).