Requirements for a Lightweight AKE for OSCORE
draft-selander-lake-reqs-04

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Last updated 2019-12-06
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Network Working Group                                         M. Vucinic
Internet-Draft                                                     Inria
Intended status: Informational                               G. Selander
Expires: June 8, 2020                                        J. Mattsson
                                                             Ericsson AB
                                                               D. Garcia
                                                     Odin Solutions S.L.
                                                       December 06, 2019

             Requirements for a Lightweight AKE for OSCORE
                      draft-selander-lake-reqs-04

Abstract

   This document compiles the requirements for a lightweight
   authenticated key exchange protocol for OSCORE.

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   This Internet-Draft will expire on June 8, 2020.

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   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
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   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Problem description . . . . . . . . . . . . . . . . . . . . .   3
     2.1.  AKE for OSCORE  . . . . . . . . . . . . . . . . . . . . .   3
     2.2.  Credentials . . . . . . . . . . . . . . . . . . . . . . .   4
     2.3.  Mutual Authentication . . . . . . . . . . . . . . . . . .   5
     2.4.  Crypto Agility and Security Properties  . . . . . . . . .   6
     2.5.  Identity Protection . . . . . . . . . . . . . . . . . . .   7
     2.6.  Application Data  . . . . . . . . . . . . . . . . . . . .   8
     2.7.  Extensibility . . . . . . . . . . . . . . . . . . . . . .   8
     2.8.  Denial of Service . . . . . . . . . . . . . . . . . . . .   9
     2.9.  Lightweight . . . . . . . . . . . . . . . . . . . . . . .   9
   3.  Requirements Summary  . . . . . . . . . . . . . . . . . . . .  16
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .  17
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  17
   Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . .  17
   7.  Informative References  . . . . . . . . . . . . . . . . . . .  17
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  19

1.  Introduction

   OSCORE [RFC8613] is a lightweight communication security protocol
   providing end-to-end security on application layer for constrained
   IoT settings (cf.  [RFC7228]).  OSCORE lacks a matching authenticated
   key exchange protocol (AKE).  The intention with LAKE is to create a
   simple yet secure AKE for implementation in embedded devices
   supporting OSCORE.

   To ensure that the AKE is efficient for the expected applications of
   OSCORE, we list the relevant public specifications of technologies
   where OSCORE is included:

   o  The IETF 6TiSCH WG charter (-02) identifies the need to "secur[e]
      the join process and mak[e] that fit within the constraints of
      high latency, low throughput and small frame sizes that
      characterize IEEE802.15.4 TSCH".  OSCORE protects the join
      protocol as described in 6TiSCH Minimal Security
      [I-D.ietf-6tisch-minimal-security].

   o  The IETF LPWAN WG charter (-01) identifies the need to improve the
      transport capabilities of LPWA networks such as NB-IoT and LoRa
      whose "common traits include ... frame sizes ... [on] the order of
      tens of bytes transmitted a few times per day at ultra-low

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