Remote Attestation Procedures Architecture
draft-birkholz-rats-architecture-02

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Last updated 2019-09-11
Replaces draft-birkholz-attestation-terminology
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Network Working Group                                        H. Birkholz
Internet-Draft                                            Fraunhofer SIT
Intended status: Standards Track                              M. Wiseman
Expires: March 15, 2020                               GE Global Research
                                                           H. Tschofenig
                                                                ARM Ltd.
                                                                N. Smith
                                                                   Intel
                                                      September 12, 2019

               Remote Attestation Procedures Architecture
                  draft-birkholz-rats-architecture-02

Abstract

   The Remote ATtestation procedureS (RATS) architecture facilitates
   interoperability of attestation mechanisms by defining a set of
   participant roles and interactions that reveal information about the
   trustworthiness attributes of an attester's computing environment.
   By making trustworthiness attributes explicit, they can be evaluated
   dynamically and within an operational context where risk mitigation
   depends on having a more complete understanding of the possible
   vulnerabilities germane to the attester's environment.

Status of This Memo

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Copyright Notice

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

Birkholz, et al.         Expires March 15, 2020                 [Page 1]
Internet-Draft              RATS Arch & Terms             September 2019

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  RATS in a Nutshell  . . . . . . . . . . . . . . . . . . .   3
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
     2.1.  Requirements Notation . . . . . . . . . . . . . . . . . .   4
   3.  Conceptual Overview . . . . . . . . . . . . . . . . . . . . .   4
     3.1.  Computing Environments  . . . . . . . . . . . . . . . . .   5
     3.2.  Trustworthiness . . . . . . . . . . . . . . . . . . . . .   6
     3.3.  RATS Workflow . . . . . . . . . . . . . . . . . . . . . .   6
     3.4.  Interoperability between RATS . . . . . . . . . . . . . .   7
   4.  RATS Architecture . . . . . . . . . . . . . . . . . . . . . .   7
     4.1.  Goals . . . . . . . . . . . . . . . . . . . . . . . . . .   7
     4.2.  Attestation Principles  . . . . . . . . . . . . . . . . .   8
     4.3.  RATS Roles and Messages . . . . . . . . . . . . . . . . .   8
       4.3.1.  Roles . . . . . . . . . . . . . . . . . . . . . . . .   9
       4.3.2.  Role Messages . . . . . . . . . . . . . . . . . . . .  10
     4.4.  RATS Principals . . . . . . . . . . . . . . . . . . . . .  11
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .  12
   6.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  12
     6.1.  Normative References  . . . . . . . . . . . . . . . . . .  12
     6.2.  Informative References  . . . . . . . . . . . . . . . . .  12
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  13

1.  Introduction

   The long-standing Internet Threat Model [RFC3552] focuses on threats
   to the communication channel, as pioneered by Dolev and Yao
   [DOLEV-YAO] in 1983.  However, threats to the endpoint [RFC5209] and
   system components [RFC4949] of transited communication gear (i.e.
   hosts) are increasingly relevant for assessing the trustworthiness
   properties of a communication channel.  Beyond the collection and
   conveyance of security posture [RFC5209] about an endpoint (host),
   remote attestation provides believable trustworthiness claims
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