Distributed SUIT Architecture Model
draft-lee-suit-distarch-01

Document Type Active Internet-Draft (individual)
Authors Jong-Hyouk Lee  , Park Jung-Soo 
Last updated 2020-10-28
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SUIT Working Group                                                J. Lee
Internet-Draft                                         Sejong University
Intended status: Standards Track                                 J. Park
Expires: May 1, 2021                                                ETRI
                                                        October 28, 2020

                  Distributed SUIT Architecture Model
                       draft-lee-suit-distarch-01

Abstract

   The management of data is entirely centralized on servers in a server
   client model which leads the servers to be high-value targets for
   adversaries.  Also, firmware consumers fail to download the latest
   firmware image if the author is disappeared in the server client
   model.  The distribution of network for managing the manifest and
   firmware image files thus required.  This draft introduces a
   distributed SUIT architecture model, which utilizes blockchains to
   resolve the issues of the server client model for SUIT.

Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL","SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in [RFC2119]

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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   This Internet-Draft will expire on May 1, 2021.

Lee & Park                 Expires May 1, 2021                  [Page 1]
Internet-Draft     Distributed SUIT Architecture Model      October 2020

Copyright Notice

   Copyright (c) 2020 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
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Motivations . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Distributed SUIT Architecture . . . . . . . . . . . . . . . .   4
   4.  Example Procedure . . . . . . . . . . . . . . . . . . . . . .   6
   5.  Conclusion  . . . . . . . . . . . . . . . . . . . . . . . . .   8
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .   8
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   8
   8.  Normative References  . . . . . . . . . . . . . . . . . . . .   8
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   8

1.  Introduction

   In the existing SUIT architecture, firmware images and manifest files
   are stored in the firmware servers, which deploy the firmware images
   based on the traditional server-client model.  However, in the
   server-client model, servers may endure excessive network traffic and
   overload because of the centralized architecture.  As the number of
   IoT devices is rapidly increasing, the servers will be overwhelming
   to handle the requests from the IoT devices all around the world.
   Also, a server is a high-value target for adversaries since the
   server takes charge of data management.

   In the server-client model, the firmware consumers are unable to
   download the latest firmware image if the authors disappeared.  In
   this draft, we propose a distributed firmware update architecture by
   applying blockchain to the existing SUIT architecture.  The proposed
   distributed SUIT architecture decentralizes the requests from the IoT
   devices, prevents targeting attacks, and provides sustainable updates
   even after an author disappears.

Lee & Park                 Expires May 1, 2021                  [Page 2]
Internet-Draft     Distributed SUIT Architecture Model      October 2020

2.  Motivations

   The existing SUIT update architecture is as follows:

               Firmware +  +----------+       Firmware + +-----------+
               Manifest    |          |-+     Manifest   |           |-+
                +--------->| Firmware | |<---------------|           | |
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