The Entity Attestation Token (EAT)
draft-ietf-rats-eat-01

Document Type Active Internet-Draft (rats WG)
Last updated 2019-07-04
Replaces draft-mandyam-rats-eat
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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

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   This Internet-Draft will expire on January 5, 2020.

Mandyam, et al.          Expires January 5, 2020                [Page 1]
Internet-Draft                     EAT                         July 2019

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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
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