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RFC 9770
Title: Notification of Revoked Access Tokens
in the Authentication and Authorization for
Constrained Environments (ACE) Framework
Author: M. Tiloca,
F. Palombini,
S. Echeverria,
G. Lewis
Status: Standards Track
Stream: IETF
Date: June 2025
Mailbox: [email protected],
[email protected],
[email protected],
[email protected]
Pages: 64
Updates/Obsoletes/SeeAlso: None
I-D Tag: draft-ietf-ace-revoked-token-notification-09.txt
URL: https://www.rfc-editor.org/info/rfc9770
DOI: 10.17487/RFC9770
This document specifies a method of the Authentication and
Authorization for Constrained Environments (ACE) framework, which
allows an authorization server to notify clients and resource servers
(i.e., registered devices) about revoked access tokens. As specified
in this document, the method allows clients and resource servers
(RSs) to access a Token Revocation List (TRL) on the authorization
server by using the Constrained Application Protocol (CoAP), with the
possible additional use of resource observation. Resulting
(unsolicited) notifications of revoked access tokens complement
alternative approaches such as token introspection, while not
requiring additional endpoints on clients and RSs.
This document is a product of the Authentication and Authorization for
Constrained Environments Working Group of the IETF.
This is now a Proposed Standard.
STANDARDS TRACK: This document specifies an Internet Standards Track
protocol for the Internet community, and requests discussion and suggestions
for improvements. Please refer to the current edition of the Official
Internet Protocol Standards (https://www.rfc-editor.org/standards) for the
standardization state and status of this protocol. Distribution of this
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