Remote Attestation Procedures Architecture
draft-ietf-rats-architecture-00

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Document Type Active Internet-Draft (rats WG)
Last updated 2019-12-17
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RATS Working Group                                           H. Birkholz
Internet-Draft                                            Fraunhofer SIT
Intended status: Informational                                 D. Thaler
Expires: 19 June 2020                                          Microsoft
                                                           M. Richardson
                                                Sandelman Software Works
                                                                N. Smith
                                                                   Intel
                                                        17 December 2019

               Remote Attestation Procedures Architecture
                    draft-ietf-rats-architecture-00

Abstract

   In network protocol exchanges, it is often the case that one entity
   (a relying party) requires evidence about a remote peer to assess the
   peer's trustworthiness, and a way to appraise such evidence.  The
   evidence is typically a set of claims about its software and hardware
   platform.  This document describes an architecture for such remote
   attestation procedures (RATS).

Note to Readers

   Discussion of this document takes place on the RATS Working Group
   mailing list (rats@ietf.org), which is archived at
   https://mailarchive.ietf.org/arch/browse/rats/
   (https://mailarchive.ietf.org/arch/browse/rats/).

   Source for this draft and an issue tracker can be found at
   https://github.com/ietf-rats-wg/architecture (https://github.com/
   ietf-rats-wg/architecture).

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."

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   This Internet-Draft will expire on 19 June 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 (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  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   2
   3.  Reference Use Cases . . . . . . . . . . . . . . . . . . . . .   4
   4.  Architectural Overview  . . . . . . . . . . . . . . . . . . .   4
   5.  Topological Models  . . . . . . . . . . . . . . . . . . . . .   5
   6.  Two Types of Environments . . . . . . . . . . . . . . . . . .   5
   7.  Trust Model . . . . . . . . . . . . . . . . . . . . . . . . .   5
   8.  Conceptual Messages . . . . . . . . . . . . . . . . . . . . .   6
   9.  Freshness . . . . . . . . . . . . . . . . . . . . . . . . . .   6
   10. Privacy Considerations  . . . . . . . . . . . . . . . . . . .   7
   11. Security Considerations . . . . . . . . . . . . . . . . . . .   7
   12. IANA Considerations . . . . . . . . . . . . . . . . . . . . .   7
   13. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .   7
   14. Contributors  . . . . . . . . . . . . . . . . . . . . . . . .   7
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   7

1.  Introduction

2.  Terminology

   The document defines the term "Remote Attestation" as follows: A
   process by which one entity (the "Attester") provides evidence about
   its identity and state to another remote entity (the "Relying
   Party"), which then assesses the Attester's trustworthiness for the
   Relying Party's own purposes.

   This document then uses the following terms:

   *  Appraisal Policy for Evidence: A set of rules that direct how a

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      verifier evaluates the validity of information about an Attester.
      Compare /security policy/ in [RFC4949].

   *  Appraisal Policy for Attestation Result: A set of rules that
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