An architecture for authorization in constrained environments
draft-ietf-ace-actors-05

Document Type Active Internet-Draft (ace WG)
Last updated 2017-03-06
Replaces draft-gerdes-ace-actors, draft-seitz-ace-problem-description
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ACE Working Group                                              S. Gerdes
Internet-Draft                                   Universitaet Bremen TZI
Intended status: Informational                                  L. Seitz
Expires: September 7, 2017                           SICS Swedish ICT AB
                                                             G. Selander
                                                                Ericsson
                                                         C. Bormann, Ed.
                                                 Universitaet Bremen TZI
                                                          March 06, 2017

     An architecture for authorization in constrained environments
                      draft-ietf-ace-actors-05

Abstract

   Constrained-node networks are networks where some nodes have severe
   constraints on code size, state memory, processing capabilities, user
   interface, power and communication bandwidth (RFC 7228).

   This document provides terminology, and identifies the elements that
   an architecture needs to address, providing a problem statement, for
   authentication and authorization in these networks.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

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   This Internet-Draft will expire on September 7, 2017.

Copyright Notice

   Copyright (c) 2017 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

Gerdes, et al.          Expires September 7, 2017               [Page 1]
Internet-Draft                 ace-actors                     March 2017

   (http://trustee.ietf.org/license-info) in effect on the date of
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   4
   2.  Architecture and High-level Problem Statement . . . . . . . .   6
     2.1.  Elements of an Architecture . . . . . . . . . . . . . . .   6
     2.2.  Architecture Variants . . . . . . . . . . . . . . . . . .   9
     2.3.  Information Flows . . . . . . . . . . . . . . . . . . . .  11
   3.  Security Objectives . . . . . . . . . . . . . . . . . . . . .  12
     3.1.  End-to-End Security Objectives in Multi-Hop Scenarios . .  13
   4.  Authentication and Authorization  . . . . . . . . . . . . . .  14
   5.  Actors and their Tasks  . . . . . . . . . . . . . . . . . . .  16
     5.1.  Constrained Level Actors  . . . . . . . . . . . . . . . .  17
     5.2.  Principal Level Actors  . . . . . . . . . . . . . . . . .  18
     5.3.  Less-Constrained Level Actors . . . . . . . . . . . . . .  18
   6.  Kinds of Protocols  . . . . . . . . . . . . . . . . . . . . .  19
     6.1.  Constrained Level Protocols . . . . . . . . . . . . . . .  19
       6.1.1.  Cross Level Support Protocols . . . . . . . . . . . .  20
     6.2.  Less-Constrained Level Protocols  . . . . . . . . . . . .  20
   7.  Elements of a Solution  . . . . . . . . . . . . . . . . . . .  20
     7.1.  Authorization . . . . . . . . . . . . . . . . . . . . . .  20
     7.2.  Authentication  . . . . . . . . . . . . . . . . . . . . .  21
     7.3.  Communication Security  . . . . . . . . . . . . . . . . .  22
     7.4.  Cryptographic Keys  . . . . . . . . . . . . . . . . . . .  22
   8.  Assumptions and Requirements  . . . . . . . . . . . . . . . .  23
     8.1.  Architecture  . . . . . . . . . . . . . . . . . . . . . .  23
     8.2.  Constrained Devices . . . . . . . . . . . . . . . . . . .  24
     8.3.  Authentication  . . . . . . . . . . . . . . . . . . . . .  25
     8.4.  Server-side Authorization . . . . . . . . . . . . . . . .  25
     8.5.  Client-side Authorization Information . . . . . . . . . .  25
     8.6.  Server-side Authorization Information . . . . . . . . . .  26
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