Key Provisioning for Group Communication using ACE
draft-palombini-ace-key-groupcomm-02

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ACE Working Group                                           F. Palombini
Internet-Draft                                               Ericsson AB
Intended status: Standards Track                               M. Tiloca
Expires: April 25, 2019                                          RISE AB
                                                        October 22, 2018

           Key Provisioning for Group Communication using ACE
                  draft-palombini-ace-key-groupcomm-02

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.

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Palombini & Tiloca       Expires April 25, 2019                 [Page 1]
Internet-Draft  Key Provisioning for Group Communication    October 2018

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Overview  . . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Authorization to Join a Group . . . . . . . . . . . . . . . .   5
     3.1.  Authorization Request . . . . . . . . . . . . . . . . . .   6
     3.2.  Authorization Response  . . . . . . . . . . . . . . . . .   7
     3.3.  Token Post  . . . . . . . . . . . . . . . . . . . . . . .   8
   4.  Key Distribution  . . . . . . . . . . . . . . . . . . . . . .   8
     4.1.  Key Distribution Request  . . . . . . . . . . . . . . . .   9
     4.2.  Key Distribution Response . . . . . . . . . . . . . . . .  10
   5.  Removal of a Node from the Group  . . . . . . . . . . . . . .  12
     5.1.  Expired Authorization . . . . . . . . . . . . . . . . . .  12
     5.2.  Request to Leave the Group  . . . . . . . . . . . . . . .  12
   6.  Retrieval of Updated Keying Material  . . . . . . . . . . . .  13
     6.1.  Key Re-Distribution Request . . . . . . . . . . . . . . .  13
     6.2.  Key Re-Distribution Response  . . . . . . . . . . . . . .  13
   7.  Retrieval of Public Keys for Group Members  . . . . . . . . .  13
     7.1.  Public Key Request  . . . . . . . . . . . . . . . . . . .  14
     7.2.  Public Key Response . . . . . . . . . . . . . . . . . . .  14
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .  15
   9.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  15
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .  15
     10.1.  Normative References . . . . . . . . . . . . . . . . . .  15
     10.2.  Informative References . . . . . . . . . . . . . . . . .  16
   Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . .  17
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  17

1.  Introduction

   This document expands the ACE framework [I-D.ietf-ace-oauth-authz] to
   define the format of messages used to request, distribute and renew
   the keying material in a group communication scenario, e.g. based on
   multicast [RFC7390] or on publishing-subscribing
   [I-D.ietf-core-coap-pubsub].

   Profiles that use group communication can build on this document to
   specify the selection of the message parameters defined in this
   document to use and their values.  Known applications that can
   benefit from this document would be, for example, profiles addressing
   group communication based on multicast [RFC7390] or publishing/
   subscribing [I-D.ietf-core-coap-pubsub] in ACE.

   If the application requires backward and forward security, updated
   keying material is generated and distributed to the group members