The Entity Attestation Token (EAT)
draft-ietf-rats-eat-01
RATS Working Group G. Mandyam
Internet-Draft Qualcomm Technologies Inc.
Intended status: Standards Track L. Lundblade
Expires: January 5, 2020 Security Theory LLC
M. Ballesteros
J. O'Donoghue
Qualcomm Technologies Inc.
July 04, 2019
The Entity Attestation Token (EAT)
draft-ietf-rats-eat-01
Abstract
An Entity Attestation Token (EAT) provides a signed (attested) set of
claims that describe state and characteristics of an entity,
typically a device like a phone or an IoT device. These claims are
used by a relying party to determine how much it wishes to trust the
entity.
An EAT is either a CWT or JWT with some attestation-oriented claims.
To a large degree, all this document does is extend CWT and JWT.
Contributing
TBD
Status of This Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet-
Drafts is at https://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
This Internet-Draft will expire on January 5, 2020.
Mandyam, et al. Expires January 5, 2020 [Page 1]
Internet-Draft EAT July 2019
Copyright Notice
Copyright (c) 2019 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
(https://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.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. CDDL, CWT and JWT . . . . . . . . . . . . . . . . . . . . 4
1.2. Entity Overview . . . . . . . . . . . . . . . . . . . . . 4
1.3. EAT Operating Models . . . . . . . . . . . . . . . . . . 5
1.4. What is Not Standardized . . . . . . . . . . . . . . . . 6
1.4.1. Transmission Protocol . . . . . . . . . . . . . . . . 6
1.4.2. Signing Scheme . . . . . . . . . . . . . . . . . . . 6
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 7
3. The Claims Information Model . . . . . . . . . . . . . . . . 8
3.1. Nonce Claim (cti and jti) . . . . . . . . . . . . . . . . 8
3.2. Timestamp claim (iat) . . . . . . . . . . . . . . . . . . 8
3.3. Universal Entity ID Claim (ueid) . . . . . . . . . . . . 8
3.4. Origination Claim (origination) . . . . . . . . . . . . . 11
3.4.1. CDDL . . . . . . . . . . . . . . . . . . . . . . . . 12
3.5. OEM identification by IEEE OUI (oemid) . . . . . . . . . 12
3.5.1. CDDL . . . . . . . . . . . . . . . . . . . . . . . . 12
3.6. The Security Level Claim (security_level) . . . . . . . . 12
3.6.1. CDDL . . . . . . . . . . . . . . . . . . . . . . . . 13
3.7. Secure Boot and Debug Enable State Claims (boot_state) . 13
3.7.1. Secure Boot Enabled . . . . . . . . . . . . . . . . . 13
3.7.2. Debug Disabled . . . . . . . . . . . . . . . . . . . 13
3.7.3. Debug Disabled Since Boot . . . . . . . . . . . . . . 14
3.7.4. Debug Permanent Disable . . . . . . . . . . . . . . . 14
3.7.5. Debug Full Permanent Disable . . . . . . . . . . . . 14
3.7.6. CDDL . . . . . . . . . . . . . . . . . . . . . . . . 14
3.8. The Location Claim (location) . . . . . . . . . . . . . . 14
3.8.1. CDDL . . . . . . . . . . . . . . . . . . . . . . . . 15
3.9. The Age Claim (age) . . . . . . . . . . . . . . . . . . . 15
3.10. The Uptime Claim (uptime) . . . . . . . . . . . . . . . . 15
3.10.1. CDDL . . . . . . . . . . . . . . . . . . . . . . . . 15
3.11. Nested EATs, the EAT Claim (nested_eat) . . . . . . . . . 15
Show full document text