The OAuth Security Model for Delegated Authorization

Document Type Expired Internet-Draft (individual)
Last updated 2009-07-08
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document describes the security model for the OAuth authorization system, which allows a party that holds some authorization to delegate a subset of that authorization to another party, without requiring either party to disclose its credentials to the other. In this document, we describe a set of design constraints, a high-level work flow for establishing authorizations subject to those constraints, and set of security requirements for protocols that implement this model.


Richard Barnes (
Matt Lepinski (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)