The Datagram Transport Layer Security (DTLS) Connection Identifier

Document Type Replaced Internet-Draft (tls WG)
Last updated 2017-12-13 (latest revision 2017-11-14)
Replaced by draft-ietf-tls-dtls-connection-id
Stream IETF
Intended RFC status (None)
Expired & archived
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Stream WG state Adopted by a WG
Document shepherd No shepherd assigned
IESG IESG state Replaced by draft-ietf-tls-dtls-connection-id
Consensus Boilerplate Unknown
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Responsible AD (None)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document specifies the "Connection ID" concept for the Datagram Transport Layer Security (DTLS) protocol, version 1.2 and version 1.3. 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.


Eric Rescorla (
Hannes Tschofenig (
Thomas Fossati (
Tobias Gondrom (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)