OpenID: is the identifier URL unique? what are the differences between the identifiers
问题 In the OpenID specs, it says: Identifier: An Identifier is just a URL. The whole flow of the OpenID Authentication protocol is about proving that an End User is, owns, a URL. Claimed Identifier: An Identifier that the End User says they own, though that has not yet been verified by the Consumer. Verified Identifier: An Identifier that the End User has proven to a Consumer that they own. Identity Provider: Also called "IdP" or "Server". This is the OpenID Authentication server that a Consumer