Key Management for OSCORE Groups in ACE
draft-ietf-ace-key-groupcomm-oscore-03
ACE Working Group M. Tiloca
Internet-Draft RISE AB
Intended status: Standards Track J. Park
Expires: May 7, 2020 Universitaet Duisburg-Essen
F. Palombini
Ericsson AB
November 04, 2019
Key Management for OSCORE Groups in ACE
draft-ietf-ace-key-groupcomm-oscore-03
Abstract
This document describes a method to request and provision keying
material in group communication scenarios where the group
communication is based on CoAP and secured with Object Security for
Constrained RESTful Environments (OSCORE). The proposed method
delegates the authentication and authorization of new client nodes
that join an OSCORE group through a Group Manager server. This
approach builds on the ACE framework for Authentication and
Authorization, and leverages protocol-specific transport profiles of
ACE to achieve communication security, proof-of-possession and server
authentication.
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Copyright Notice
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document authors. All rights reserved.
Tiloca, et al. Expires May 7, 2020 [Page 1]
Internet-Draft Key Management for OSCORE Groups in ACE November 2019
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Terminology . . . . . . . . . . . . . . . . . . . . . . . 4
2. Protocol Overview . . . . . . . . . . . . . . . . . . . . . . 5
2.1. Overview of the Joining Process . . . . . . . . . . . . . 7
2.2. Overview of the Group Rekeying Process . . . . . . . . . 8
3. Joining Node to Authorization Server . . . . . . . . . . . . 8
3.1. Authorization Request . . . . . . . . . . . . . . . . . . 9
3.2. Authorization Response . . . . . . . . . . . . . . . . . 9
4. Joining Node to Group Manager . . . . . . . . . . . . . . . . 10
4.1. Token Post . . . . . . . . . . . . . . . . . . . . . . . 10
4.2. Joining Request . . . . . . . . . . . . . . . . . . . . . 12
4.3. Joining Response . . . . . . . . . . . . . . . . . . . . 13
5. Public Keys of Joining Nodes . . . . . . . . . . . . . . . . 17
6. Retrieval of Updated Keying Material . . . . . . . . . . . . 19
7. Retrieval of New Keying Material . . . . . . . . . . . . . . 19
8. Retrieval of Public Keys of Group Members . . . . . . . . . . 20
9. Retrieval of Group Policies . . . . . . . . . . . . . . . . . 20
10. Retrieval of Keying Material Version . . . . . . . . . . . . 21
11. Request to Leave the Group . . . . . . . . . . . . . . . . . 21
12. Removal of a Group Member . . . . . . . . . . . . . . . . . . 21
13. Group Rekeying Process . . . . . . . . . . . . . . . . . . . 22
14. Security Considerations . . . . . . . . . . . . . . . . . . . 23
15. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 24
15.1. ACE Groupcomm Key Registry . . . . . . . . . . . . . . . 24
15.2. OSCORE Security Context Parameters Registry . . . . . . 24
15.3. ACE Groupcomm Profile Registry . . . . . . . . . . . . . 26
15.4. Sequence Number Synchronization Method Registry . . . . 26
15.5. ACE Groupcomm Parameters Registry . . . . . . . . . . . 27
16. References . . . . . . . . . . . . . . . . . . . . . . . . . 27
16.1. Normative References . . . . . . . . . . . . . . . . . . 27
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