draft-ietf-perc-srtp-ekt-diet-11.txt   draft-ietf-perc-srtp-ekt-diet-12.txt 
Network Working Group C. Jennings Network Working Group C. Jennings
Internet-Draft Cisco Systems Internet-Draft Cisco Systems
Intended status: Standards Track J. Mattsson Intended status: Standards Track J. Mattsson
Expires: July 18, 2020 Ericsson AB Expires: December 20, 2020 Ericsson AB
D. McGrew D. McGrew
Cisco Systems Cisco Systems
D. Wing D. Wing
Citrix Systems, Inc. Citrix Systems, Inc.
F. Andreason F. Andreason
Cisco Systems Cisco Systems
January 15, 2020 June 18, 2020
Encrypted Key Transport for DTLS and Secure RTP Encrypted Key Transport for DTLS and Secure RTP
draft-ietf-perc-srtp-ekt-diet-11 draft-ietf-perc-srtp-ekt-diet-12
Abstract Abstract
Encrypted Key Transport (EKT) is an extension to DTLS (Datagram Encrypted Key Transport (EKT) is an extension to DTLS (Datagram
Transport Layer Security) and Secure Real-time Transport Protocol Transport Layer Security) and Secure Real-time Transport Protocol
(SRTP) that provides for the secure transport of SRTP master keys, (SRTP) that provides for the secure transport of SRTP master keys,
rollover counters, and other information within SRTP. This facility rollover counters, and other information within SRTP. This facility
enables SRTP for decentralized conferences by distributing a common enables SRTP for decentralized conferences by distributing a common
key to all of the conference endpoints. key to all of the conference endpoints.
skipping to change at page 1, line 42 skipping to change at page 1, line 42
Internet-Drafts are working documents of the Internet Engineering Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet- working documents as Internet-Drafts. The list of current Internet-
Drafts is at https://datatracker.ietf.org/drafts/current/. Drafts is at https://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress." material or to cite them other than as "work in progress."
This Internet-Draft will expire on July 18, 2020. This Internet-Draft will expire on December 20, 2020.
Copyright Notice Copyright Notice
Copyright (c) 2020 IETF Trust and the persons identified as the Copyright (c) 2020 IETF Trust and the persons identified as the
document authors. All rights reserved. document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents Provisions Relating to IETF Documents
(https://trustee.ietf.org/license-info) in effect on the date of (https://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents publication of this document. Please review these documents
skipping to change at page 5, line 33 skipping to change at page 5, line 33
The EKTField uses the format defined in Figure 1 for the FullEKTField The EKTField uses the format defined in Figure 1 for the FullEKTField
and ShortEKTField. and ShortEKTField.
0 1 2 3 0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
: : : :
: EKT Ciphertext : : EKT Ciphertext :
: : : :
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Security Parameter Index | Length | | Security Parameter Index | Epoch |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|0 0 0 0 0 0 1 0| | Length |0 0 0 0 0 0 1 0|
+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 1: FullEKTField format Figure 1: FullEKTField format
0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7
+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+
|0 0 0 0 0 0 0 0| |0 0 0 0 0 0 0 0|
+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+
Figure 2: ShortEKTField format Figure 2: ShortEKTField format
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[I-D.ietf-perc-private-media-framework] [I-D.ietf-perc-private-media-framework]
Jones, P., Benham, D., and C. Groves, "A Solution Jones, P., Benham, D., and C. Groves, "A Solution
Framework for Private Media in Privacy Enhanced RTP Framework for Private Media in Privacy Enhanced RTP
Conferencing (PERC)", draft-ietf-perc-private-media- Conferencing (PERC)", draft-ietf-perc-private-media-
framework-12 (work in progress), June 2019. framework-12 (work in progress), June 2019.
[I-D.ietf-tls-dtls13] [I-D.ietf-tls-dtls13]
Rescorla, E., Tschofenig, H., and N. Modadugu, "The Rescorla, E., Tschofenig, H., and N. Modadugu, "The
Datagram Transport Layer Security (DTLS) Protocol Version Datagram Transport Layer Security (DTLS) Protocol Version
1.3", draft-ietf-tls-dtls13-34 (work in progress), 1.3", draft-ietf-tls-dtls13-38 (work in progress), May
November 2019. 2020.
[RFC4086] Eastlake 3rd, D., Schiller, J., and S. Crocker, [RFC4086] Eastlake 3rd, D., Schiller, J., and S. Crocker,
"Randomness Requirements for Security", BCP 106, RFC 4086, "Randomness Requirements for Security", BCP 106, RFC 4086,
DOI 10.17487/RFC4086, June 2005, DOI 10.17487/RFC4086, June 2005,
<https://www.rfc-editor.org/info/rfc4086>. <https://www.rfc-editor.org/info/rfc4086>.
Authors' Addresses Authors' Addresses
Cullen Jennings Cullen Jennings
Cisco Systems Cisco Systems
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