Remote Attestation Procedures Architecture
draft-ietf-rats-architecture-04
RATS Working Group H. Birkholz
Internet-Draft Fraunhofer SIT
Intended status: Informational D. Thaler
Expires: 22 November 2020 Microsoft
M. Richardson
Sandelman Software Works
N. Smith
Intel
W. Pan
Huawei Technologies
21 May 2020
Remote Attestation Procedures Architecture
draft-ietf-rats-architecture-04
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
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Birkholz, et al. Expires 22 November 2020 [Page 1]
Internet-Draft RATS Arch & Terms May 2020
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This Internet-Draft will expire on 22 November 2020.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 4
3. Reference Use Cases . . . . . . . . . . . . . . . . . . . . . 5
3.1. Network Endpoint Assessment . . . . . . . . . . . . . . . 5
3.2. Confidential Machine Learning (ML) Model Protection . . . 6
3.3. Confidential Data Retrieval . . . . . . . . . . . . . . . 6
3.4. Critical Infrastructure Control . . . . . . . . . . . . . 6
3.5. Trusted Execution Environment (TEE) Provisioning . . . . 7
3.6. Hardware Watchdog . . . . . . . . . . . . . . . . . . . . 7
4. Architectural Overview . . . . . . . . . . . . . . . . . . . 7
4.1. Appraisal Policies . . . . . . . . . . . . . . . . . . . 9
4.2. Two Types of Environments of an Attester . . . . . . . . 9
4.3. Layered Attestation Environments . . . . . . . . . . . . 10
4.4. Composite Device . . . . . . . . . . . . . . . . . . . . 12
5. Topological Models . . . . . . . . . . . . . . . . . . . . . 15
5.1. Passport Model . . . . . . . . . . . . . . . . . . . . . 15
5.2. Background-Check Model . . . . . . . . . . . . . . . . . 16
5.3. Combinations . . . . . . . . . . . . . . . . . . . . . . 17
6. Roles and Entities . . . . . . . . . . . . . . . . . . . . . 18
7. Trust Model . . . . . . . . . . . . . . . . . . . . . . . . . 19
8. Conceptual Messages . . . . . . . . . . . . . . . . . . . . . 20
8.1. Evidence . . . . . . . . . . . . . . . . . . . . . . . . 21
8.2. Endorsements . . . . . . . . . . . . . . . . . . . . . . 21
8.3. Attestation Results . . . . . . . . . . . . . . . . . . . 22
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