Final: OpenID Authentication 2.0 - FinalAbstract OpenID Authentication provides a way to prove that an end user controls an Identifier. It does this without the Relying Party needing access to end user credentials such as a password or to other sensitive information such as an email address. OpenID is decentralized. No central authority must approve or register Relying Parties or OpenID Providers. An end user can freely choose which Ope
