A Datagram Transport Layer Security (DTLS) 1.2 Profile for the Internet of Things
draft-ietf-dice-profile-06

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Document Type Active Internet-Draft (dice WG)
Last updated 2014-12-08
Replaces draft-hartke-dice-profile
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dice                                                  H. Tschofenig, Ed.
Internet-Draft                                                  ARM Ltd.
Intended status: Standards Track                              T. Fossati
Expires: June 11, 2015                                    Alcatel-Lucent
                                                        December 8, 2014

A Datagram Transport Layer Security (DTLS) 1.2 Profile for the Internet
                               of Things
                     draft-ietf-dice-profile-06.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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   Internet-Drafts are draft documents valid for a maximum of six months
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   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 June 11, 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

Tschofenig & Fossati      Expires June 11, 2015                 [Page 1]
Internet-Draft          DTLS 1.2 Profile for IoT           December 2014

   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  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  DTLS Protocol Overview  . . . . . . . . . . . . . . . . . . .   4
   4.  The Communication Model . . . . . . . . . . . . . . . . . . .   5
   5.  The Ciphersuite Concept . . . . . . . . . . . . . . . . . . .   7
   6.  Credential Types  . . . . . . . . . . . . . . . . . . . . . .   9
     6.1.  Pre-Shared Secret . . . . . . . . . . . . . . . . . . . .   9
     6.2.  Raw Public Key  . . . . . . . . . . . . . . . . . . . . .  11
     6.3.  Certificates  . . . . . . . . . . . . . . . . . . . . . .  13
   7.  Signature Algorithm Extension . . . . . . . . . . . . . . . .  15
   8.  Error Handling  . . . . . . . . . . . . . . . . . . . . . . .  16
   9.  Session Resumption  . . . . . . . . . . . . . . . . . . . . .  17
   10. Compression . . . . . . . . . . . . . . . . . . . . . . . . .  18
   11. Perfect Forward Secrecy . . . . . . . . . . . . . . . . . . .  18
   12. Keep-Alive  . . . . . . . . . . . . . . . . . . . . . . . . .  19
   13. Timeouts  . . . . . . . . . . . . . . . . . . . . . . . . . .  20
   14. Random Number Generation  . . . . . . . . . . . . . . . . . .  21
   15. Truncated MAC Extension . . . . . . . . . . . . . . . . . . .  22
   16. Server Name Indication (SNI)  . . . . . . . . . . . . . . . .  22
   17. Maximum Fragment Length Negotiation . . . . . . . . . . . . .  22
   18. TLS Session Hash  . . . . . . . . . . . . . . . . . . . . . .  23
   19. Re-Negotiation Attacks  . . . . . . . . . . . . . . . . . . .  23
   20. Downgrading Attacks . . . . . . . . . . . . . . . . . . . . .  23
   21. Crypto Agility  . . . . . . . . . . . . . . . . . . . . . . .  24
   22. Key Length Recommendations  . . . . . . . . . . . . . . . . .  25
   23. TLS False Start . . . . . . . . . . . . . . . . . . . . . . .  25
   24. Privacy Considerations  . . . . . . . . . . . . . . . . . . .  26
   25. Security Considerations . . . . . . . . . . . . . . . . . . .  27
   26. IANA Considerations . . . . . . . . . . . . . . . . . . . . .  27
   27. Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  27
   28. References  . . . . . . . . . . . . . . . . . . . . . . . . .  27
     28.1.  Normative References . . . . . . . . . . . . . . . . . .  28
     28.2.  Informative References . . . . . . . . . . . . . . . . .  29
   Appendix A.  Conveying DTLS over SMS  . . . . . . . . . . . . . .  32
     A.1.  Overview  . . . . . . . . . . . . . . . . . . . . . . . .  32
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