Overview#OpenID is an open standard that allows users to be authenticated by certain co-operating sites (known as Relying Parties or RP) using a third party service, eliminating the need for web-masters to provide their own ad hoc systems and allowing users to consolidate their digital identities.
Users may create accounts with their preferred OpenID identity providers, and then use those accounts as the basis for signing on to any website which accepts OpenID authentication.
An extension to the standard (the OpenID Attribute Exchange) facilitates the transfer of user attributes, such as name and gender, from the OpenID identity provider to the relying party (each relying party may request a different set of attributes, depending on its requirements).
The OpenID protocol does not rely on a central authority to authenticate a user's identity. Moreover, neither services nor the OpenID standard may mandate a specific means by which to authenticate users, allowing for approaches ranging from the common (such as passwords) to the novel (such as smart cards or biometrics).
The term OpenID may also refer to an identifier as specified in the OpenID standard; these identifiers take the form of a unique URI, and are managed by some 'OpenID provider' that handles authentication.OpenID Connect.
OpenID Providers#A better place to find Public OpenID providers
AOL#All AOL users have an OpenID with a URL of:
More Information#There might be more information for this subject on one of the following:
- Authentication Protocol
- Dick Hardt
- JSON Identity Suite
- OpenID Artifact Binding Working Group
- Single Sign-On Scenarios
- Web Blog_blogentry_010116_1
- Why OAuth 2.0