A Datagram Transport Layer Security (DTLS) 1.2 Profile for the Internet of Things
draft-ietf-dice-profile-04

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Replaces draft-hartke-dice-profile
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dice                                                  H. Tschofenig, Ed.
Internet-Draft                                                  ARM Ltd.
Intended status: Standards Track                         August 31, 2014
Expires: March 4, 2015

A Datagram Transport Layer Security (DTLS) 1.2 Profile for the Internet
                               of Things
                     draft-ietf-dice-profile-04.txt

Abstract

   This document defines a DTLS 1.2 profile that is suitable for
   Internet of Things applications and is reasonably implementable on
   many constrained devices.

   A common design pattern in IoT deployments is the use of a
   constrained device (typically providing sensor data) that interacts
   with the web infrastructure.  This document focuses on this
   particular pattern.

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
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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
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   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on March 4, 2015.

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
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect

Tschofenig                Expires March 4, 2015                 [Page 1]
Internet-Draft          DTLS 1.2 Profile for IoT             August 2014

   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.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  The Communication Model . . . . . . . . . . . . . . . . . . .   5
   4.  The Ciphersuite Concept . . . . . . . . . . . . . . . . . . .   6
   5.  Credential Types  . . . . . . . . . . . . . . . . . . . . . .   8
     5.1.  Pre-Shared Secret . . . . . . . . . . . . . . . . . . . .   8
     5.2.  Raw Public Key  . . . . . . . . . . . . . . . . . . . . .   9
     5.3.  Certificates  . . . . . . . . . . . . . . . . . . . . . .  11
   6.  Error Handling  . . . . . . . . . . . . . . . . . . . . . . .  13
   7.  Session Resumption  . . . . . . . . . . . . . . . . . . . . .  14
   8.  Compression . . . . . . . . . . . . . . . . . . . . . . . . .  14
   9.  Perfect Forward Secrecy . . . . . . . . . . . . . . . . . . .  15
   10. Keep-Alive  . . . . . . . . . . . . . . . . . . . . . . . . .  15
   11. Random Number Generation  . . . . . . . . . . . . . . . . . .  16
   12. Client Certificate URLs . . . . . . . . . . . . . . . . . . .  17
   13. Trusted CA Indication . . . . . . . . . . . . . . . . . . . .  17
   14. Truncated MAC Extension . . . . . . . . . . . . . . . . . . .  18
   15. Server Name Indication (SNI)  . . . . . . . . . . . . . . . .  18
   16. Maximum Fragment Length Negotiation . . . . . . . . . . . . .  19
   17. TLS Session Hash  . . . . . . . . . . . . . . . . . . . . . .  19
   18. Negotiation and Downgrading Attacks . . . . . . . . . . . . .  19
   19. Privacy Considerations  . . . . . . . . . . . . . . . . . . .  20
   20. Security Considerations . . . . . . . . . . . . . . . . . . .  20
   21. IANA Considerations . . . . . . . . . . . . . . . . . . . . .  21
   22. Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  21
   23. References  . . . . . . . . . . . . . . . . . . . . . . . . .  21
     23.1.  Normative References . . . . . . . . . . . . . . . . . .  21
     23.2.  Informative References . . . . . . . . . . . . . . . . .  22
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .  24

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.  The DTLS
   1.2 protocol is based on Transport Layer Security (TLS) 1.2 [RFC5246]
   and provides equivalent security guarantees.  This document aims to
   meet the following goals:

   o  Serves as a one-stop shop for implementers to know which pieces of
      the specification jungle contain relevant details.
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