Network Device Attestation Workflow
draft-fedorkow-rats-network-device-attestation-01

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RATS Working Group                                      G. Fedorkow, Ed.
Internet-Draft                                    Juniper Networks, Inc.
Intended status: Informational                       J. Fitzgerald-McKay
Expires: December 3, 2019                       National Security Agency
                                                            June 1, 2019

                  Network Device Attestation Workflow
           draft-fedorkow-rats-network-device-attestation-01

Abstract

   This document describes a workflow for network device attestation.

Status of This Memo

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   This Internet-Draft will expire on December 3, 2019.

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   Copyright (c) 2019 IETF Trust and the persons identified as the
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Fedorkow & Fitzgerald-McExpires December 3, 2019                [Page 1]
Internet-Draft     Network Device Attestation Workflow         June 2019

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Requirements Language . . . . . . . . . . . . . . . . . .   4
     1.2.  Goals . . . . . . . . . . . . . . . . . . . . . . . . . .   4
     1.3.  Description of Remote Integrity Verification (RIV)  . . .   5
     1.4.  Solution Requirements . . . . . . . . . . . . . . . . . .   6
     1.5.  Scope . . . . . . . . . . . . . . . . . . . . . . . . . .   7
       1.5.1.  Out of Scope  . . . . . . . . . . . . . . . . . . . .   8
       1.5.2.  Why Remote Integrity Verification?  . . . . . . . . .   8
       1.5.3.  Network Device Attestation Challenges . . . . . . . .   8
       1.5.4.  Why is OS Attestation Different?  . . . . . . . . . .  10
   2.  Solution Outline  . . . . . . . . . . . . . . . . . . . . . .  10
     2.1.  RIV Software Configuration Attestation using TPM  . . . .  10
     2.2.  RIV Keying  . . . . . . . . . . . . . . . . . . . . . . .  11
     2.3.  RIV Information Flow  . . . . . . . . . . . . . . . . . .  12
     2.4.  RIV Simplifying Assumptions . . . . . . . . . . . . . . .  13
       2.4.1.  DevID Alternatives  . . . . . . . . . . . . . . . . .  14
       2.4.2.  Additional Attestation of Platform Characteristics  .  14
       2.4.3.  Root of Trust for Measurement . . . . . . . . . . . .  15
       2.4.4.  Reference Integrity Manifests (RIMs)  . . . . . . . .  15
       2.4.5.  Attestation Logs  . . . . . . . . . . . . . . . . . .  16
   3.  Standards Components  . . . . . . . . . . . . . . . . . . . .  17
     3.1.  Reference Models  . . . . . . . . . . . . . . . . . . . .  17
       3.1.1.  IETF Reference Model for Challenge-Response Remote
               Attestation . . . . . . . . . . . . . . . . . . . . .  17
     3.2.  RIV Workflow  . . . . . . . . . . . . . . . . . . . . . .  18
     3.3.  Layering Model for Network Equipment Attester and
           Verifier  . . . . . . . . . . . . . . . . . . . . . . . .  20
   4.  Privacy Considerations  . . . . . . . . . . . . . . . . . . .  22
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .  22
   6.  Conclusion  . . . . . . . . . . . . . . . . . . . . . . . . .  26
   7.  Appendix  . . . . . . . . . . . . . . . . . . . . . . . . . .  27
     7.1.  Implementation Notes  . . . . . . . . . . . . . . . . . .  27
     7.2.  Comparison with TCG PTS / IETF NEA  . . . . . . . . . . .  30
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  31
   9.  Informative References  . . . . . . . . . . . . . . . . . . .  31
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  34

1.  Introduction

   There are many aspects to consider in fielding a trusted computing
   device, from operating systems to applications.  Mechanisms to prove
   that a device installed at a customer's site is authentic (i.e., not
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