A DTLS 1.2 Profile for the Internet of Things
draft-ietf-dice-profile-00

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dice                                                           K. Hartke
Internet-Draft                                   Universitaet Bremen TZI
Intended status: Informational                             H. Tschofenig
Expires: October 2, 2014                                        ARM Ltd.
                                                          March 31, 2014

             A DTLS 1.2 Profile for the Internet of Things
                       draft-ietf-dice-profile-00

Abstract

   This document defines a DTLS profile that is suitable for Internet of
   Things applications and is reasonably implementable on many
   constrained devices.

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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   This Internet-Draft will expire on October 2, 2014.

Copyright Notice

   Copyright (c) 2014 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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   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
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   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  The Communication Model . . . . . . . . . . . . . . . . . . .   4
   3.  The Ciphersuite Concept . . . . . . . . . . . . . . . . . . .   5
   4.  Pre-Shared Secret Authentication with DTLS  . . . . . . . . .   6
   5.  Raw Public Key Use with DTLS  . . . . . . . . . . . . . . . .   8
   6.  Certificate Use with DTLS . . . . . . . . . . . . . . . . . .  10
   7.  Error Handling  . . . . . . . . . . . . . . . . . . . . . . .  11
   8.  Session Resumption  . . . . . . . . . . . . . . . . . . . . .  12
   9.  TLS Compression . . . . . . . . . . . . . . . . . . . . . . .  13
   10. Perfect Forward Secrecy . . . . . . . . . . . . . . . . . . .  13
   11. Keep-Alive  . . . . . . . . . . . . . . . . . . . . . . . . .  14
   12. Negotiation and Downgrading Attacks . . . . . . . . . . . . .  14
   13. Privacy Considerations  . . . . . . . . . . . . . . . . . . .  14
   14. Security Considerations . . . . . . . . . . . . . . . . . . .  15
   15. IANA Considerations . . . . . . . . . . . . . . . . . . . . .  15
   16. Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  15
   17. References  . . . . . . . . . . . . . . . . . . . . . . . . .  16
     17.1.  Normative References . . . . . . . . . . . . . . . . . .  16
     17.2.  Informative References . . . . . . . . . . . . . . . . .  17
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  19

1.  Introduction

   This document defines a DTLS 1.2 [RFC6347] profile that offers
   communication security for Internet of Things (IoT) applications and
   is reasonably implementable on many constrained devices.  It aims to
   meet the following goals:

   o  One-stop shop for implementers through the specification jungle.

   o  This document does not alter the DTLS 1.2 specification.

   o  This document does not introduce new extensions.

   o  This profile aligns with the DTLS security modes of the
      Constrained Application Protocol (CoAP) [I-D.ietf-core-coap].

   DTLS is used to secure a number of applications run over an
   unreliable datagram transport.  CoAP [I-D.ietf-core-coap] is one such
   protocol and has been designed specifically for use in IoT
   environments.  CoAP can be secured using a number of different ways,
   also called security modes.  These security modes are:

   No Security Protection at the Transport Layer:  No DTLS is used but
      instead application layer security functionality is assumed.

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   Shared Secret-based DTLS Authentication:  DTLS supports the use of
      shared secrets [RFC4279].  This credential is useful if the number
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