Proof-of-Possession Key Semantics for JSON Web Tokens (JWTs)
RFC 7800
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RFC - Proposed Standard
(April 2016; No errata)
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Last updated |
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2016-04-06
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Replaces |
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draft-jones-oauth-proof-of-possession
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IETF
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plain text
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Submitted to IESG for Publication
(wg milestone:
Mar 2016 - Submit 'Proof-of-Pos...
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Document shepherd |
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Kepeng Li
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Shepherd write-up |
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(last changed 2015-11-04)
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RFC 7800 (Proposed Standard)
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Consensus Boilerplate |
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Yes
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Kathleen Moriarty
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| IANA |
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RFC-Ed-Ack
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Internet Engineering Task Force (IETF) M. Jones
Request for Comments: 7800 Microsoft
Category: Standards Track J. Bradley
ISSN: 2070-1721 Ping Identity
H. Tschofenig
ARM Limited
April 2016
Proof-of-Possession Key Semantics for JSON Web Tokens (JWTs)
Abstract
This specification describes how to declare in a JSON Web Token (JWT)
that the presenter of the JWT possesses a particular proof-of-
possession key and how the recipient can cryptographically confirm
proof of possession of the key by the presenter. Being able to prove
possession of a key is also sometimes described as the presenter
being a holder-of-key.
Status of This Memo
This is an Internet Standards Track document.
This document is a product of the Internet Engineering Task Force
(IETF). It represents the consensus of the IETF community. It has
received public review and has been approved for publication by the
Internet Engineering Steering Group (IESG). Further information on
Internet Standards is available in Section 2 of RFC 5741.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
http://www.rfc-editor.org/info/rfc7800.
Copyright Notice
Copyright (c) 2016 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Jones, et al. Standards Track [Page 1]
RFC 7800 Proof-of-Possession Key for JWTs April 2016
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Notational Conventions . . . . . . . . . . . . . . . . . 5
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 5
3. Representations for Proof-of-Possession Keys . . . . . . . . 5
3.1. Confirmation Claim . . . . . . . . . . . . . . . . . . . 6
3.2. Representation of an Asymmetric Proof-of-Possession Key . 7
3.3. Representation of an Encrypted Symmetric Proof-of-
Possession Key . . . . . . . . . . . . . . . . . . . . . 7
3.4. Representation of a Key ID for a Proof-of-Possession Key 8
3.5. Representation of a URL for a Proof-of-Possession Key . . 9
3.6. Specifics Intentionally Not Specified . . . . . . . . . . 10
4. Security Considerations . . . . . . . . . . . . . . . . . . . 10
5. Privacy Considerations . . . . . . . . . . . . . . . . . . . 11
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 11
6.1. JSON Web Token Claims Registration . . . . . . . . . . . 12
6.1.1. Registry Contents . . . . . . . . . . . . . . . . . . 12
6.2. JWT Confirmation Methods Registry . . . . . . . . . . . . 12
6.2.1. Registration Template . . . . . . . . . . . . . . . . 12
6.2.2. Initial Registry Contents . . . . . . . . . . . . . . 13
7. References . . . . . . . . . . . . . . . . . . . . . . . . . 13
7.1. Normative References . . . . . . . . . . . . . . . . . . 13
7.2. Informative References . . . . . . . . . . . . . . . . . 14
Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . . 15
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 15
1. Introduction
This specification describes how a JSON Web Token [JWT] can declare
that the presenter of the JWT possesses a particular proof-of-
possession (PoP) key and how the recipient can cryptographically
confirm proof of possession of the key by the presenter. Proof of
possession of a key is also sometimes described as the presenter
being a holder-of-key. The [OAUTH-POP-ARCH] specification describes
key confirmation, among other confirmation mechanisms. This
specification defines how to communicate confirmation key information
in JWTs.
Envision the following two use cases. The first use case employs a
symmetric proof-of-possession key and the second use case employs an
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