Grant

Full Title or Meme

An Authorization Grant is a specific structure that gives some entity on the internet authorization to access a Resource.

Context

In OAuth 2.0 an authorization grant is defined as:

  An authorization grant is a credential representing the resource owner's authorization (to access its protected resources) used by the
  client to obtain an access token.  This specification defines four grant types -- authorization code, implicit, resource owner password
  credentials, and client credentials -- as well as an extensibility mechanism for defining additional types.

Later use extended grant types to include authorization for users to get access to Resources as well as User Consent for a Relying Party to access User Information.

Problems

Once an Authorization Grant is issued as a Bearer Token is no practical way to Revoke it.

Solutions

1. Give Authorization Grants a short life time, like 5 to 10 minuets, which could create problems for long running interactions with a Subject.