An architecture for authorization in constrained environments
draft-ietf-ace-actors-06

Document Type Active Internet-Draft (ace WG)
Last updated 2017-11-13
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: May 18, 2018                                          RISE SICS
                                                             G. Selander
                                                                Ericsson
                                                         C. Bormann, Ed.
                                                 Universitaet Bremen TZI
                                                       November 14, 2017

     An architecture for authorization in constrained environments
                        draft-ietf-ace-actors-06

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 May 18, 2018.

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 May 18, 2018                  [Page 1]
Internet-Draft                 ace-actors                  November 2017

   (https://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
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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
     8.7.  Resource Access . . . . . . . . . . . . . . . . . . . . .  26
     8.8.  Keys and Cipher Suites  . . . . . . . . . . . . . . . . .  27
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