Key Management for OSCORE Groups in ACE
draft-ietf-ace-key-groupcomm-oscore-02
ACE Working Group M. Tiloca
Internet-Draft RISE AB
Intended status: Standards Track J. Park
Expires: January 6, 2020 Universitaet Duisburg-Essen
F. Palombini
Ericsson AB
July 05, 2019
Key Management for OSCORE Groups in ACE
draft-ietf-ace-key-groupcomm-oscore-02
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.
Status of This Memo
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Copyright Notice
Copyright (c) 2019 IETF Trust and the persons identified as the
document authors. All rights reserved.
Tiloca, et al. Expires January 6, 2020 [Page 1]
Internet-Draft Key Management for OSCORE Groups in ACE July 2019
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Terminology . . . . . . . . . . . . . . . . . . . . . . . 4
1.2. Relation to Other Documents . . . . . . . . . . . . . . . 5
2. Protocol Overview . . . . . . . . . . . . . . . . . . . . . . 6
2.1. Overview of the Join Process . . . . . . . . . . . . . . 7
2.2. Overview of the Group Rekeying Process . . . . . . . . . 8
3. Joining Node to Authorization Server . . . . . . . . . . . . 9
3.1. Authorization Request . . . . . . . . . . . . . . . . . . 9
3.2. Authorization Response . . . . . . . . . . . . . . . . . 10
4. Joining Node to Group Manager . . . . . . . . . . . . . . . . 11
4.1. Token Post . . . . . . . . . . . . . . . . . . . . . . . 11
4.2. Join Request . . . . . . . . . . . . . . . . . . . . . . 12
4.3. Join Response . . . . . . . . . . . . . . . . . . . . . . 13
5. Leaving of a Group Member . . . . . . . . . . . . . . . . . . 17
6. Public Keys of Joining Nodes . . . . . . . . . . . . . . . . 18
7. Group Rekeying Process . . . . . . . . . . . . . . . . . . . 20
8. Security Considerations . . . . . . . . . . . . . . . . . . . 21
9. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 22
9.1. ACE Groupcomm Key Registry . . . . . . . . . . . . . . . 22
9.2. OSCORE Security Context Parameters Registry . . . . . . . 23
9.3. ACE Groupcomm Profile Registry . . . . . . . . . . . . . 24
9.4. Sequence Number Synchronization Method Registry . . . . . 24
9.5. ACE Public Key Encoding Registry . . . . . . . . . . . . 25
10. References . . . . . . . . . . . . . . . . . . . . . . . . . 25
10.1. Normative References . . . . . . . . . . . . . . . . . . 25
10.2. Informative References . . . . . . . . . . . . . . . . . 26
Appendix A. Profile Requirements . . . . . . . . . . . . . . . . 27
Appendix B. Document Updates . . . . . . . . . . . . . . . . . . 28
B.1. Version -01 to -02 . . . . . . . . . . . . . . . . . . . 28
B.2. Version -00 to -01 . . . . . . . . . . . . . . . . . . . 29
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