Practical Considerations and Implementation Experiences in Securing Smart Object Networks
draft-ietf-lwig-crypto-sensors-00

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Light-Weight Implementation Guidance                            M. Sethi
Internet-Draft                                                  J. Arkko
Intended status: Informational                                A. Keranen
Expires: March 8, 2017                                          Ericsson
                                                                 H. Back
                                                                 Comptel
                                                       September 4, 2016

  Practical Considerations and Implementation Experiences in Securing
                         Smart Object Networks
                   draft-ietf-lwig-crypto-sensors-00

Abstract

   This memo describes challenges associated with securing smart object
   devices in constrained implementations and environments.  The memo
   describes a possible deployment model suitable for these
   environments, discusses the availability of cryptographic libraries
   for small devices, presents some preliminary experiences in
   implementing small devices using those libraries, and discusses
   trade-offs involving different types of 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 http://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 March 8, 2017.

Copyright Notice

   Copyright (c) 2016 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
   (http://trustee.ietf.org/license-info) in effect on the date of

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Internet-Draft      Smart Object Security Experiences     September 2016

   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Related Work  . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Challenges  . . . . . . . . . . . . . . . . . . . . . . . . .   4
   4.  Proposed Deployment Model . . . . . . . . . . . . . . . . . .   5
   5.  Provisioning  . . . . . . . . . . . . . . . . . . . . . . . .   5
   6.  Protocol Architecture . . . . . . . . . . . . . . . . . . . .   8
   7.  Code Availability . . . . . . . . . . . . . . . . . . . . . .   8
   8.  Implementation Experiences  . . . . . . . . . . . . . . . . .  10
   9.  Example Application . . . . . . . . . . . . . . . . . . . . .  16
   10. Design Trade-Offs . . . . . . . . . . . . . . . . . . . . . .  20
   11. Feasibility . . . . . . . . . . . . . . . . . . . . . . . . .  20
   12. Freshness . . . . . . . . . . . . . . . . . . . . . . . . . .  21
   13. Layering  . . . . . . . . . . . . . . . . . . . . . . . . . .  23
   14. Symmetric vs. Asymmetric Crypto . . . . . . . . . . . . . . .  25
   15. Security Considerations . . . . . . . . . . . . . . . . . . .  25
   16. IANA Considerations . . . . . . . . . . . . . . . . . . . . .  26
   17. Informative references  . . . . . . . . . . . . . . . . . . .  26
   Appendix A.  Acknowledgments  . . . . . . . . . . . . . . . . . .  31
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  31

1.  Introduction

   This memo describes challenges associated with securing smart object
   devices in constrained implementations and environments (see
   Section 3).

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

   Thirdly, Section 7 discusses the availability of cryptographic
   libraries.  Section 8 presents some experiences in implementing small
   devices using those libraries, including information about achievable
   code sizes and speeds on typical hardware.

   Finally, Section 10 discusses trade-offs involving different types of
   security approaches.

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