Key Provisioning for Group Communication using ACE
draft-ietf-ace-key-groupcomm-00
ACE Working Group F. Palombini
Internet-Draft Ericsson AB
Intended status: Standards Track M. Tiloca
Expires: June 23, 2019 RISE AB
December 20, 2018
Key Provisioning for Group Communication using ACE
draft-ietf-ace-key-groupcomm-00
Abstract
This document defines message formats and procedures for requesting
and distributing group keying material using the ACE framework, to
protect communications between group members.
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Palombini & Tiloca Expires June 23, 2019 [Page 1]
Internet-Draft Key Provisioning for Group Communication December 2018
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Terminology . . . . . . . . . . . . . . . . . . . . . . . 3
2. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. Authorization to Join a Group . . . . . . . . . . . . . . . . 5
3.1. Authorization Request . . . . . . . . . . . . . . . . . . 6
3.2. Authorization Response . . . . . . . . . . . . . . . . . 7
3.3. Token Post . . . . . . . . . . . . . . . . . . . . . . . 8
4. Key Distribution . . . . . . . . . . . . . . . . . . . . . . 8
4.1. Key Distribution Request . . . . . . . . . . . . . . . . 9
4.2. Key Distribution Response . . . . . . . . . . . . . . . . 10
5. Removal of a Node from the Group . . . . . . . . . . . . . . 12
5.1. Expired Authorization . . . . . . . . . . . . . . . . . . 12
5.2. Request to Leave the Group . . . . . . . . . . . . . . . 12
6. Retrieval of Updated Keying Material . . . . . . . . . . . . 13
6.1. Key Re-Distribution Request . . . . . . . . . . . . . . . 13
6.2. Key Re-Distribution Response . . . . . . . . . . . . . . 13
7. Retrieval of Public Keys for Group Members . . . . . . . . . 13
7.1. Public Key Request . . . . . . . . . . . . . . . . . . . 14
7.2. Public Key Response . . . . . . . . . . . . . . . . . . . 14
8. Security Considerations . . . . . . . . . . . . . . . . . . . 15
9. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 15
10. References . . . . . . . . . . . . . . . . . . . . . . . . . 15
10.1. Normative References . . . . . . . . . . . . . . . . . . 15
10.2. Informative References . . . . . . . . . . . . . . . . . 16
Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . 17
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 17
1. Introduction
This document expands the ACE framework [I-D.ietf-ace-oauth-authz] to
define the format of messages used to request, distribute and renew
the keying material in a group communication scenario, e.g. based on
multicast [RFC7390] or on publishing-subscribing
[I-D.ietf-core-coap-pubsub].
Profiles that use group communication can build on this document to
specify the selection of the message parameters defined in this
document to use and their values. Known applications that can
benefit from this document would be, for example, profiles addressing
group communication based on multicast [RFC7390] or publishing/
subscribing [I-D.ietf-core-coap-pubsub] in ACE.
If the application requires backward and forward security, updated
keying material is generated and distributed to the group members
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