Remote Attestation Procedures Architecture
draft-birkholz-rats-architecture-03
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).
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This Internet-Draft will expire on May 7, 2020.
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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
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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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