Practical Considerations and Implementation Experiences in Securing Smart Object Networks
draft-ietf-lwig-crypto-sensors-06

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Light-Weight Implementation Guidance                            M. Sethi
Internet-Draft                                                  J. Arkko
Intended status: Informational                                A. Keranen
Expires: August 30, 2018                                        Ericsson
                                                                 H. Back
                                                                   Nokia
                                                       February 26, 2018

  Practical Considerations and Implementation Experiences in Securing
                         Smart Object Networks
                   draft-ietf-lwig-crypto-sensors-06

Abstract

   This memo describes challenges associated with securing resource-
   constrained smart object devices.  The memo describes a possible
   deployment model where resource-constrained devices sign message
   objects, discusses the availability of cryptographic libraries for
   resource-constrained devices and presents some preliminary
   experiences with those libraries for message signing on resource-
   constrained devices.  Lastly, the memo discusses trade-offs involving
   different types of security approaches.

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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   Drafts is at https://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on August 30, 2018.

Copyright Notice

   Copyright (c) 2018 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

Sethi, et al.            Expires August 30, 2018                [Page 1]
Internet-Draft      Smart Object Security Experiences      February 2018

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Related Work  . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Challenges  . . . . . . . . . . . . . . . . . . . . . . . . .   4
   4.  Proposed Deployment Model . . . . . . . . . . . . . . . . . .   6
     4.1.  Provisioning  . . . . . . . . . . . . . . . . . . . . . .   6
     4.2.  Protocol Architecture . . . . . . . . . . . . . . . . . .   9
   5.  Code Availability . . . . . . . . . . . . . . . . . . . . . .  10
   6.  Implementation Experiences  . . . . . . . . . . . . . . . . .  11
   7.  Example Application . . . . . . . . . . . . . . . . . . . . .  18
   8.  Design Trade-Offs . . . . . . . . . . . . . . . . . . . . . .  21
     8.1.  Feasibility . . . . . . . . . . . . . . . . . . . . . . .  21
     8.2.  Freshness . . . . . . . . . . . . . . . . . . . . . . . .  22
     8.3.  Layering  . . . . . . . . . . . . . . . . . . . . . . . .  24
     8.4.  Symmetric vs. Asymmetric Crypto . . . . . . . . . . . . .  26
   9.  Summary . . . . . . . . . . . . . . . . . . . . . . . . . . .  27
   10. Security Considerations . . . . . . . . . . . . . . . . . . .  27
   11. IANA Considerations . . . . . . . . . . . . . . . . . . . . .  27
   12. Informative references  . . . . . . . . . . . . . . . . . . .  27
   Appendix A.  Acknowledgments  . . . . . . . . . . . . . . . . . .  34
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  34

1.  Introduction

   This memo describes challenges associated with securing smart object
   devices in constrained implementations and environments.  In
   Section 3 we specifically discuss three challenges: the
   implementation difficulties encountered on resource-constrained
   platforms, the problem of provisioning keys and making the choice of
   implementing security at the appropriate layer.

   Section 4 discusses a potential deployment model for constrained
   environments.  The model requires minimal amount of configuration,
   and we believe it is a natural fit with the typical communication
   practices in smart object networking environments.

   Section 5 discusses the availability of cryptographic libraries.