A Firmware Update Architecture for Internet of Things Devices
draft-ietf-suit-architecture-05
SUIT B. Moran
Internet-Draft Arm Limited
Intended status: Informational M. Meriac
Expires: October 11, 2019 Consultant
H. Tschofenig
Arm Limited
D. Brown
Linaro
April 09, 2019
A Firmware Update Architecture for Internet of Things Devices
draft-ietf-suit-architecture-05
Abstract
Vulnerabilities with Internet of Things (IoT) devices have raised the
need for a solid and secure firmware update mechanism that is also
suitable for constrained devices. Incorporating such update
mechanism to fix vulnerabilities, to update configuration settings as
well as adding new functionality is recommended by security experts.
This document lists requirements and describes an architecture for a
firmware update mechanism suitable for IoT devices. The architecture
is agnostic to the transport of the firmware images and associated
meta-data.
This version of the document assumes asymmetric cryptography and a
public key infrastructure. Future versions may also describe a
symmetric key approach for very constrained devices.
Status of This Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
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Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
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material or to cite them other than as "work in progress."
This Internet-Draft will expire on October 11, 2019.
Moran, et al. Expires October 11, 2019 [Page 1]
Internet-Draft IoT Firmware Update Architecture April 2019
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Conventions and Terminology . . . . . . . . . . . . . . . . . 3
3. Requirements . . . . . . . . . . . . . . . . . . . . . . . . 6
3.1. Agnostic to how firmware images are distributed . . . . . 7
3.2. Friendly to broadcast delivery . . . . . . . . . . . . . 7
3.3. Use state-of-the-art security mechanisms . . . . . . . . 7
3.4. Rollback attacks must be prevented . . . . . . . . . . . 8
3.5. High reliability . . . . . . . . . . . . . . . . . . . . 8
3.6. Operate with a small bootloader . . . . . . . . . . . . . 8
3.7. Small Parsers . . . . . . . . . . . . . . . . . . . . . . 9
3.8. Minimal impact on existing firmware formats . . . . . . . 9
3.9. Robust permissions . . . . . . . . . . . . . . . . . . . 9
3.10. Operating modes . . . . . . . . . . . . . . . . . . . . . 9
4. Claims . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5. Communication Architecture . . . . . . . . . . . . . . . . . 12
6. Manifest . . . . . . . . . . . . . . . . . . . . . . . . . . 16
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