Remote Attestation Procedures Architecture
draft-birkholz-rats-architecture-03

Document Type Active Internet-Draft (individual)
Last updated 2019-11-04
Replaces draft-birkholz-attestation-terminology
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RATS Working Group                                           H. Birkholz
Internet-Draft                                            Fraunhofer SIT
Intended status: Standards Track                              M. Wiseman
Expires: May 7, 2020                                  GE Global Research
                                                           H. Tschofenig
                                                                ARM Ltd.
                                                                N. Smith
                                                                   Intel
                                                           M. Richardson
                                                Sandelman Software Works
                                                       November 04, 2019

               Remote Attestation Procedures Architecture
                  draft-birkholz-rats-architecture-03

Abstract

   An entity (a relying party) requires a source of truth and evidence
   about a remote peer to assess the peer's trustworthiness.  The
   evidence is typically a believable set of claims about its host,
   software or hardware platform.  This document describes an
   architecture for such remote attestation procedures (RATS).

Status of This Memo

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   This Internet-Draft will expire on May 7, 2020.

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

Birkholz, et al.           Expires May 7, 2020                  [Page 1]
Internet-Draft              RATS Arch & Terms              November 2019

   (https://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Motivation  . . . . . . . . . . . . . . . . . . . . . . .   3
     1.2.  Opportunities . . . . . . . . . . . . . . . . . . . . . .   3
     1.3.  Overview of Document  . . . . . . . . . . . . . . . . . .   4
     1.4.  RATS in a Nutshell  . . . . . . . . . . . . . . . . . . .   5
     1.5.  Remote Attestation Workflow . . . . . . . . . . . . . . .   5
     1.6.  Message Flows . . . . . . . . . . . . . . . . . . . . . .   7
       1.6.1.  Passport Model  . . . . . . . . . . . . . . . . . . .   7
       1.6.2.  Background Check  . . . . . . . . . . . . . . . . . .   8
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   9
   3.  Reference use cases . . . . . . . . . . . . . . . . . . . . .  10
     3.1.  Device Capabilities/Firmware Attestation  . . . . . . . .  11
     3.2.  IETF TEEP WG Use-Case . . . . . . . . . . . . . . . . . .  11
     3.3.  Safety Critical Systems . . . . . . . . . . . . . . . . .  12
     3.4.  Virtualized Multi-Tenant Hosts  . . . . . . . . . . . . .  12
     3.5.  Cryptographic Key Attestation . . . . . . . . . . . . . .  13
     3.6.  Geographic Evidence . . . . . . . . . . . . . . . . . . .  13
     3.7.  Device Provenance Attestation . . . . . . . . . . . . . .  14
   4.  Conceptual Overview . . . . . . . . . . . . . . . . . . . . .  14
     4.1.  Two Types of Environments . . . . . . . . . . . . . . . .  15
     4.2.  Evidence Creation Prerequisites . . . . . . . . . . . . .  16
     4.3.  Trustworthiness . . . . . . . . . . . . . . . . . . . . .  17
     4.4.  Workflow  . . . . . . . . . . . . . . . . . . . . . . . .  17
     4.5.  Interoperability between RATS . . . . . . . . . . . . . .  18
   5.  RATS Architecture . . . . . . . . . . . . . . . . . . . . . .  18
     5.1.  Goals . . . . . . . . . . . . . . . . . . . . . . . . . .  18
     5.2.  Attestation Principles  . . . . . . . . . . . . . . . . .  18
     5.3.  Attestation Workflow  . . . . . . . . . . . . . . . . . .  19
       5.3.1.  Roles . . . . . . . . . . . . . . . . . . . . . . . .  19
       5.3.2.  Role Messages . . . . . . . . . . . . . . . . . . . .  20
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