UDP Transport Layer (UDPTL) over Datagram Transport Layer Security (DTLS)
draft-ietf-mmusic-udptl-dtls-01

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Last updated 2013-11-21
Replaces draft-holmberg-dispatch-udptl-dtls, draft-holmberg-mmusic-udptl-dtls
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MMUSIC Working Group                                         C. Holmberg
Internet-Draft                                               I. Sedlacek
Intended status: Standards Track                                Ericsson
Expires: May 25, 2014                                       G. Salgueiro
                                                                   Cisco
                                                       November 21, 2013

   UDP Transport Layer (UDPTL) over Datagram Transport Layer Security
                                 (DTLS)
                    draft-ietf-mmusic-udptl-dtls-01

Abstract

   This document specifies how the UDP Transport Layer (UDPTL) protocol
   can be transported over the Datagram Transport Layer Security (DTLS)
   protocol, how the usage of UDPTL over DTLS is indicated in the
   Session Description Protocol (SDP), and how UDPTL over DTLS is
   negotiated in a session established using the Session Initiation
   Protocol (SIP).

Status of This Memo

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   This Internet-Draft will expire on May 25, 2014.

Copyright Notice

   Copyright (c) 2013 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

Holmberg, et al.          Expires May 25, 2014                  [Page 1]
Internet-Draft               UDPTL over DTLS               November 2013

   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.  Conventions . . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Secure Channel  . . . . . . . . . . . . . . . . . . . . . . .   4
     3.1.  Secure Channel Establishment  . . . . . . . . . . . . . .   5
     3.2.  Secure Channel Usage  . . . . . . . . . . . . . . . . . .   5
   4.  Miscellaneous Considerations  . . . . . . . . . . . . . . . .   6
     4.1.  Anonymous Calls . . . . . . . . . . . . . . . . . . . . .   6
     4.2.  Middlebox Interaction . . . . . . . . . . . . . . . . . .   6
     4.3.  Rekeying  . . . . . . . . . . . . . . . . . . . . . . . .   6
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .   6
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   7
   7.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .   7
   8.  Change Log  . . . . . . . . . . . . . . . . . . . . . . . . .   7
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   8
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .   8
     9.2.  Informative References  . . . . . . . . . . . . . . . . .  10
   Appendix A.  Example  . . . . . . . . . . . . . . . . . . . . . .  10
     A.1.  General . . . . . . . . . . . . . . . . . . . . . . . . .  10
     A.2.  Basic Message Flow with Identity  . . . . . . . . . . . .  10
     A.3.  Message Flow Of T.38 Fax Replacing Audio Media Stream in
           An Existing Audio-Only Session  . . . . . . . . . . . . .  15
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  18

1.  Introduction

   While telephony encryption devices have been traditionally used for
   highly sensitive documents, secure fax on the Public Switched
   Telephone Network (PSTN) was not as widely considered or prioritized
   because of the challenges involved with physical access to telephony
   equipment.  As real-time communications transition to IP networks,
   where information might potentially be intercepted or spoofed, an
   appropriate level of security for fax that offers integrity and
   confidentiality protection is vital.  Some of the security mechanisms
   for securing fax include:

   o  [ITU.T30.2005] Annex H specifies integrity and confidentiality
      protection of fax in application layer, independent of protocol
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