Framework for Establishing a Secure Real-time Transport Protocol (SRTP) Security Context Using Datagram Transport Layer Security (DTLS)
RFC 5763
Document | Type |
RFC - Proposed Standard
(May 2010; Errata)
Updated by RFC 8842
|
|
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Authors | Hannes Tschofenig , Eric Rescorla , Jason Fischl | ||
Last updated | 2015-10-14 | ||
Replaces | draft-fischl-sipping-media-dtls | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized bibtex | ||
Stream | WG state | (None) | |
Document shepherd | No shepherd assigned | ||
IESG | IESG state | RFC 5763 (Proposed Standard) | |
Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | Cullen Jennings | ||
Send notices to | (None) |
Internet Engineering Task Force (IETF) J. Fischl Request for Comments: 5763 Skype, Inc. Category: Standards Track H. Tschofenig ISSN: 2070-1721 Nokia Siemens Networks E. Rescorla RTFM, Inc. May 2010 Framework for Establishing a Secure Real-time Transport Protocol (SRTP) Security Context Using Datagram Transport Layer Security (DTLS) Abstract This document specifies how to use the Session Initiation Protocol (SIP) to establish a Secure Real-time Transport Protocol (SRTP) security context using the Datagram Transport Layer Security (DTLS) protocol. It describes a mechanism of transporting a fingerprint attribute in the Session Description Protocol (SDP) that identifies the key that will be presented during the DTLS handshake. The key exchange travels along the media path as opposed to the signaling path. The SIP Identity mechanism can be used to protect the integrity of the fingerprint attribute from modification by intermediate proxies. Status of This Memo This is an Internet Standards Track document. This document is a product of the Internet Engineering Task Force (IETF). It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG). Further information on Internet Standards is available in Section 2 of RFC 5741. Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at http://www.rfc-editor.org/info/rfc5763. Fischl, et al. Standards Track [Page 1] RFC 5763 DTLS-SRTP Framework May 2010 Copyright Notice Copyright (c) 2010 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 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. This document may contain material from IETF Documents or IETF Contributions published or made publicly available before November 10, 2008. The person(s) controlling the copyright in some of this material may not have granted the IETF Trust the right to allow modifications of such material outside the IETF Standards Process. Without obtaining an adequate license from the person(s) controlling the copyright in such materials, this document may not be modified outside the IETF Standards Process, and derivative works of it may not be created outside the IETF Standards Process, except to format it for publication as an RFC or to translate it into languages other than English. Table of Contents 1. Introduction ....................................................4 2. Overview ........................................................5 3. Motivation ......................................................7 4. Terminology .....................................................8 5. Establishing a Secure Channel ...................................8 6. Miscellaneous Considerations ...................................10 6.1. Anonymous Calls ...........................................10 6.2. Early Media ...............................................11 6.3. Forking ...................................................11 6.4. Delayed Offer Calls .......................................11 6.5. Multiple Associations .....................................11 6.6. Session Modification ......................................12 6.7. Middlebox Interaction .....................................12 6.7.1. ICE Interaction ....................................12 6.7.2. Latching Control without ICE .......................13 6.8. Rekeying ..................................................13 6.9. Conference Servers and Shared Encryptions Contexts ........13 6.10. Media over SRTP ..........................................14 6.11. Best Effort Encryption ...................................14 Fischl, et al. Standards Track [Page 2] RFC 5763 DTLS-SRTP Framework May 2010Show full document text