Key Provisioning for Group Communication using ACE
draft-ietf-ace-key-groupcomm-08

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Last updated 2020-07-13
Replaces draft-palombini-ace-key-groupcomm
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ACE Working Group                                           F. Palombini
Internet-Draft                                               Ericsson AB
Intended status: Standards Track                               M. Tiloca
Expires: 14 January 2021                                         RISE AB
                                                            13 July 2020

           Key Provisioning for Group Communication using ACE
                    draft-ietf-ace-key-groupcomm-08

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.

Discussion Venues

   This note is to be removed before publishing as an RFC.

   Source for this draft and an issue tracker can be found at
   https://github.com/ace-wg/ace-key-groupcomm.

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 14 January 2021.

Copyright Notice

   Copyright (c) 2020 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 (https://trustee.ietf.org/
   license-info) in effect on the date of publication of this document.

Palombini & Tiloca       Expires 14 January 2021                [Page 1]
Internet-Draft  Key Provisioning for Group Communication       July 2020

   Please review these documents carefully, as they describe your rights
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Overview  . . . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Authorization to Join a Group . . . . . . . . . . . . . . . .   7
     3.1.  Authorization Request . . . . . . . . . . . . . . . . . .   7
     3.2.  Authorization Response  . . . . . . . . . . . . . . . . .   9
     3.3.  Token Post  . . . . . . . . . . . . . . . . . . . . . . .  10
   4.  Keying Material Provisioning and Group Membership
           Management  . . . . . . . . . . . . . . . . . . . . . . .  14
     4.1.  Interface at the KDC  . . . . . . . . . . . . . . . . . .  15
     4.2.  Joining Exchange  . . . . . . . . . . . . . . . . . . . .  31
     4.3.  Retrieval of Updated Keying Material  . . . . . . . . . .  32
     4.4.  Retrieval of New Individual Keying Material . . . . . . .  34
     4.5.  Retrieval of Public Keys and Roles for Group Members  . .  35
     4.6.  Update of Public Key  . . . . . . . . . . . . . . . . . .  35
     4.7.  Retrieval of Group Policies . . . . . . . . . . . . . . .  36
     4.8.  Retrieval of Keying Material Version  . . . . . . . . . .  37
     4.9.  Group Leaving Request . . . . . . . . . . . . . . . . . .  37
   5.  Removal of a Node from the Group  . . . . . . . . . . . . . .  37
   6.  ACE Groupcomm Parameters  . . . . . . . . . . . . . . . . . .  38
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .  40
     7.1.  Update of Keying Material . . . . . . . . . . . . . . . .  41
     7.2.  Block-Wise Considerations . . . . . . . . . . . . . . . .  42
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  42
     8.1.  Media Type Registrations  . . . . . . . . . . . . . . . .  42
     8.2.  CoAP Content-Formats Registry . . . . . . . . . . . . . .  43
     8.3.  OAuth Parameters Registry . . . . . . . . . . . . . . . .  43
     8.4.  OAuth Parameters CBOR Mappings Registry . . . . . . . . .  44
     8.5.  ACE Groupcomm Parameters Registry . . . . . . . . . . . .  44
     8.6.  ACE Groupcomm Key Registry  . . . . . . . . . . . . . . .  45
     8.7.  ACE Groupcomm Profile Registry  . . . . . . . . . . . . .  45
     8.8.  ACE Groupcomm Policy Registry . . . . . . . . . . . . . .  46
     8.9.  Sequence Number Synchronization Method Registry . . . . .  47
     8.10. Interface Description (if=) Link Target Attribute Values
            Registry . . . . . . . . . . . . . . . . . . . . . . . .  47
     8.11. Expert Review Instructions  . . . . . . . . . . . . . . .  47
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