Reference Interaction Model for Challenge-Response-based Remote Attestation
draft-birkholz-rats-reference-interaction-model-01

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Replaces draft-birkholz-reference-ra-interaction-model
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RATS Working Group                                           H. Birkholz
Internet-Draft                                                  M. Eckel
Intended status: Informational                            Fraunhofer SIT
Expires: January 9, 2020                                   July 08, 2019

    Reference Interaction Model for Challenge-Response-based Remote
                              Attestation
           draft-birkholz-rats-reference-interaction-model-01

Abstract

   This document defines an interaction model for a basic remote
   attestation procedure.  Additionally, the required information
   elements are illustrated.

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Copyright Notice

   Copyright (c) 2019 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Requirements notation . . . . . . . . . . . . . . . . . .   2
   2.  Disambiguation  . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . .   3
   4.  Component Roles . . . . . . . . . . . . . . . . . . . . . . .   3
   5.  Prerequisites . . . . . . . . . . . . . . . . . . . . . . . .   3
   6.  Remote Attestation Interaction Model  . . . . . . . . . . . .   4
     6.1.  Information Elements  . . . . . . . . . . . . . . . . . .   4
     6.2.  Interaction Model . . . . . . . . . . . . . . . . . . . .   6
   7.  Further Context . . . . . . . . . . . . . . . . . . . . . . .   7
     7.1.  Confidentiality . . . . . . . . . . . . . . . . . . . . .   7
     7.2.  Mutual Authentication . . . . . . . . . . . . . . . . . .   7
     7.3.  Hardware-Enforcement/Support  . . . . . . . . . . . . . .   7
   8.  Security and Privacy Considerations . . . . . . . . . . . . .   8
   9.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .   8
   10. Change Log  . . . . . . . . . . . . . . . . . . . . . . . . .   8
   11. References  . . . . . . . . . . . . . . . . . . . . . . . . .   8
     11.1.  Normative References . . . . . . . . . . . . . . . . . .   8
     11.2.  Informative References . . . . . . . . . . . . . . . . .   9
   Appendix A.  CDDL Specification for a simple CoAP
                Challenge/Response Interaction . . . . . . . . . . .   9
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  10

1.  Introduction

   Remote attestation procedures (RATS) are a combination of activities,
   in which a Verifier creates assertions about assertions of integrity
   and about characteristics of other system entities by the appraisal
   of corresponding signed assertions (evidence).  In this document, a
   reference interaction model for a generic challenge-response-based
   remote attestation procedure is provided.  The minimum set of
   components, roles and information elements that have to be conveyed
   between Verifier and Attester are defined as a standard reference to
   derive more complex RATS from.

1.1.  Requirements notation

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
   "OPTIONAL" in this document are to be interpreted as described in
   BCP 14 [RFC2119] [RFC8174] when, and only when, they appear in all
   capitals, as shown here.

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2.  Disambiguation

   The term "Remote Attestation" is a common expression and often
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