Key Management for OSCORE Groups in ACE
draft-ietf-ace-key-groupcomm-oscore-03

Document Type Active Internet-Draft (ace WG)
Last updated 2019-11-04
Replaces draft-tiloca-ace-oscoap-joining
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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.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
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   This Internet-Draft will expire on May 7, 2020.

Copyright Notice

   Copyright (c) 2019 IETF Trust and the persons identified as the
   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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