Full Title or Meme
Information passed from an Identifier or Attribute Provider to a Relying Party to indicate that the user has consented to authorized access to User Information.
The context is an internet flow of Authorization as consented by the User.
Provide access to User Information in order to enable the user to obtain the access desired to some internet Resource.
Based on a protocol selection of OpenID Connect or OAuth 2.0, the full solution is described in the Identity Model.
This is the definition in RFC 6749 The OAuth 2.0 Authorization Framework. In this case the authorization server is one end point in the Identifier or Attribute Provider.
The authorization code is obtained by using an authorization server
as an intermediary between the client and resource owner. Instead of
requesting authorization directly from the resource owner, the client
directs the resource owner to an authorization server (via its
User Agent as defined in [RFC 2616]), which in turn directs the
resource owner back to the client with the authorization code.
Other protocols, like SAML 2.0 are also available.