Key Management for OSCORE Groups in ACE
draft-ietf-ace-key-groupcomm-oscore-01

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ACE Working Group                                              M. Tiloca
Internet-Draft                                                   RISE AB
Intended status: Standards Track                                 J. Park
Expires: September 9, 2019                   Universitaet Duisburg-Essen
                                                            F. Palombini
                                                             Ericsson AB
                                                          March 08, 2019

                Key Management for OSCORE Groups in ACE
               draft-ietf-ace-key-groupcomm-oscore-01

Abstract

   This document describes a method to request and provision keying
   material in group communication scenarios where communications are
   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 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
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
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   This Internet-Draft will expire on September 9, 2019.

Copyright Notice

   Copyright (c) 2019 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents

Tiloca, et al.          Expires September 9, 2019               [Page 1]
Internet-Draft   Key Management for OSCORE Groups in ACE      March 2019

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   3
     1.2.  Relation to Other Documents . . . . . . . . . . . . . . .   5
   2.  Protocol Overview . . . . . . . . . . . . . . . . . . . . . .   5
     2.1.  Overview of the Join Process  . . . . . . . . . . . . . .   7
     2.2.  Overview of the Group Rekeying Process  . . . . . . . . .   8
   3.  Joining Node to Authorization Server  . . . . . . . . . . . .   8
     3.1.  Authorization Request . . . . . . . . . . . . . . . . . .   8
     3.2.  Authorization Response  . . . . . . . . . . . . . . . . .   9
   4.  Joining Node to Group Manager . . . . . . . . . . . . . . . .  10
     4.1.  Token Post  . . . . . . . . . . . . . . . . . . . . . . .  10
       4.1.1.  'key info' Parameter  . . . . . . . . . . . . . . . .  11
     4.2.  Join Request  . . . . . . . . . . . . . . . . . . . . . .  11
     4.3.  Join Response . . . . . . . . . . . . . . . . . . . . . .  12
   5.  Leaving of a Group Member . . . . . . . . . . . . . . . . . .  14
   6.  Public Keys of Joining Nodes  . . . . . . . . . . . . . . . .  15
   7.  Group Rekeying Process  . . . . . . . . . . . . . . . . . . .  16
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .  16
   9.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  17
     9.1.  ACE Authorization Server Request Creation Hints Registry   17
     9.2.  ACE Groupcomm Key Registry  . . . . . . . . . . . . . . .  17
     9.3.  OSCORE Security Context Parameters Registry . . . . . . .  18
     9.4.  ACE Groupcomm Profile Registry  . . . . . . . . . . . . .  18
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .  19
     10.1.  Normative References . . . . . . . . . . . . . . . . . .  19
     10.2.  Informative References . . . . . . . . . . . . . . . . .  20
   Appendix A.  Document Updates . . . . . . . . . . . . . . . . . .  20
     A.1.  Version -00 to -01  . . . . . . . . . . . . . . . . . . .  21
   Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . .  21
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  21