Full Title or Meme
An ID Token is a data structure that carries information about a Subject. It may be an abbreviation for Identity token or Identifier token depending the the context of use. In this the term Identifier token is preferred.
- The definition from OpenID Connect Core 1.0.
The primary extension that OpenID Connect makes to OAuth 2.0 to enable End-Users to be Authenticated is the ID Token data structure. The ID Token is a security token that contains Claims about the Authentication of an End-User by an Authorization Server when using a Client, and potentially other requested Claims. The ID Token is represented as a JSON Web Token (JWT) [JWT].