Connection Identifiers for DTLS 1.2
draft-ietf-tls-dtls-connection-id-08
TLS E. Rescorla, Ed.
Internet-Draft RTFM, Inc.
Updates: 6347 (if approved) H. Tschofenig, Ed.
Intended status: Standards Track T. Fossati
Expires: May 6, 2021 Arm Limited
November 02, 2020
Connection Identifiers for DTLS 1.2
draft-ietf-tls-dtls-connection-id-08
Abstract
This document specifies the Connection ID (CID) construct for the
Datagram Transport Layer Security (DTLS) protocol version 1.2.
A CID 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
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This Internet-Draft will expire on May 6, 2021.
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This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
Rescorla, et al. Expires May 6, 2021 [Page 1]
Internet-Draft DTLS 1.2 Connection ID November 2020
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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 . . . . . . . . . . . . . . . . . . 7
5.1. Block Ciphers . . . . . . . . . . . . . . . . . . . . . . 8
5.2. Block Ciphers with Encrypt-then-MAC processing . . . . . 8
5.3. AEAD Ciphers . . . . . . . . . . . . . . . . . . . . . . 8
6. Peer Address Update . . . . . . . . . . . . . . . . . . . . . 8
7. Examples . . . . . . . . . . . . . . . . . . . . . . . . . . 10
8. Privacy Considerations . . . . . . . . . . . . . . . . . . . 12
9. Security Considerations . . . . . . . . . . . . . . . . . . . 12
10. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 13
11. References . . . . . . . . . . . . . . . . . . . . . . . . . 13
11.1. Normative References . . . . . . . . . . . . . . . . . . 13
11.2. Informative References . . . . . . . . . . . . . . . . . 14
Appendix A. History . . . . . . . . . . . . . . . . . . . . . . 15
Appendix B. Working Group Information . . . . . . . . . . . . . 16
Appendix C. Contributors . . . . . . . . . . . . . . . . . . . . 16
Appendix D. Acknowledgements . . . . . . . . . . . . . . . . . . 17
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 17
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