Connection Identifiers for DTLS 1.2
draft-ietf-tls-dtls-connection-id-02

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TLS                                                     E. Rescorla, Ed.
Internet-Draft                                                RTFM, Inc.
Updates: 6347 (if approved)                           H. Tschofenig, Ed.
Intended status: Standards Track                             Arm Limited
Expires: April 25, 2019                                       T. Fossati
                                                                   Nokia
                                                              T. Gondrom
                                                                  Huawei
                                                        October 22, 2018

                  Connection Identifiers for DTLS 1.2
                  draft-ietf-tls-dtls-connection-id-02

Abstract

   This document specifies the Connection ID construct for the Datagram
   Transport Layer Security (DTLS) protocol version 1.2.

   A Connection ID is an identifier carried in the record layer header
   that gives the recipient additional information for selecting the
   appropriate security association.  In "classical" DTLS, selecting a
   security association of an incoming DTLS record is accomplished with
   the help of the 5-tuple.  If the source IP address and/or source port
   changes during the lifetime of an ongoing DTLS session then the
   receiver will be unable to locate the correct security context.

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
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   This Internet-Draft will expire on April 25, 2019.

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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
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   This document may contain material from IETF Documents or IETF
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   Without obtaining an adequate license from the person(s) controlling
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   than English.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Conventions and Terminology . . . . . . . . . . . . . . . . .   3
   3.  The "connection_id" Extension . . . . . . . . . . . . . . . .   3
   4.  Record Layer Extensions . . . . . . . . . . . . . . . . . . .   5
   5.  Record Payload Protection . . . . . . . . . . . . . . . . . .   5
   6.  Examples  . . . . . . . . . . . . . . . . . . . . . . . . . .   6
   7.  Security and Privacy Considerations . . . . . . . . . . . . .   7
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   8
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   8
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .   8
     9.2.  Informative References  . . . . . . . . . . . . . . . . .   9
   Appendix A.  History  . . . . . . . . . . . . . . . . . . . . . .  10
   Appendix B.  Working Group Information  . . . . . . . . . . . . .  10
   Appendix C.  Contributors . . . . . . . . . . . . . . . . . . . .  10
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  11

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1.  Introduction

   The Datagram Transport Layer Security (DTLS) protocol was designed