SWORN: Secure Wake on Radio Nudging
draft-bormann-t2trg-sworn-01

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Network Working Group                                         C. Bormann
Internet-Draft                                   Universitaet Bremen TZI
Intended status: Informational                          October 30, 2017
Expires: May 3, 2018

                  SWORN: Secure Wake on Radio Nudging
                      draft-bormann-t2trg-sworn-01

Abstract

   Normally off devices (RFC7228) would need to expend considerable
   energy resources to be reachable at all times.  Instead, MAC layer
   mechanisms are often employed that allow the last hop router of the
   device to "wake" the device via radio when needed.  Activating these
   devices even for a short time still does expend energy and thus
   should be available to authorized correspondents only.
   Traditionally, this has been achieved by heavy firewalling, allowing
   only authorized hosts to reach the device at all.  This may be too
   inflexible for an Internet of Things.

   The present report describes how to use a combination of currently
   standardized (or in progress) technologies to securely effect this
   authorization.

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 3, 2018.

Copyright Notice

   Copyright (c) 2017 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

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   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.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Assumptions and Requirements  . . . . . . . . . . . . . . . .   3
     2.1.  Security goals  . . . . . . . . . . . . . . . . . . . . .   3
   3.  Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . .   3
     3.1.  Wake-Grant  . . . . . . . . . . . . . . . . . . . . . . .   3
     3.2.  Wake-Token  . . . . . . . . . . . . . . . . . . . . . . .   4
     3.3.  Finding the wake token  . . . . . . . . . . . . . . . . .   4
   4.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   5
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .   5
   6.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   5
     6.1.  Normative References  . . . . . . . . . . . . . . . . . .   5
     6.2.  Informative References  . . . . . . . . . . . . . . . . .   6
   Acknowledgements  . . . . . . . . . . . . . . . . . . . . . . . .   6
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .   6

1.  Introduction

1.1.  Terminology

   The term "byte" is used in its now customary sense as a synonym for
   "octet".

   Messages defined in this document employ CBOR [RFC7049] are described
   in CDDL [I-D.ietf-cbor-cddl].

   Terms used in this draft:

   C: Client, or Correspondent host.  The node that wants to effect
      "Wake on Radio" on D by sending a message to D.

   D: Device.  This is typically battery operated and "Normally off"
      [RFC7228].

   R: Router.  The router that is adjacent to D, sharing an energy-
      saving link with D, and serving as a ("parent") router to D.

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2.  Assumptions and Requirements

   D is a normally off [RFC7228] device, waking up very briefly to
   communicate with its first hop router R.  R and D share a MAC layer
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