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OAuth 2.0 Authorization Server Issuer Identifier in Authorization Response

Document Type Replaced Internet-Draft (individual)
Expired & archived
Authors Karsten Meyer zu Selhausen , Daniel Fett
Last updated 2020-11-17
Replaced by RFC 9207
RFC stream (None)
Intended RFC status (None)
Stream Stream state (No stream defined)
Consensus boilerplate Unknown
RFC Editor Note (None)
IESG IESG state Replaced by draft-ietf-oauth-iss-auth-resp
Telechat date (None)
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


This document specifies a new parameter "iss" that is used to explicitly include the issuer identifier of the authorization server in the authorization response of an OAuth authorization flow. If implemented correctly, the "iss" parameter serves as an effective countermeasure to "mix-up attacks".


Karsten Meyer zu Selhausen
Daniel Fett

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