PASSporT SHAKEN Extension (SHAKEN)
draft-wendt-stir-passport-shaken-01

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stir                                                            C. Wendt
Internet-Draft                                                   Comcast
Intended status: Standards Track                               M. Barnes
Expires: May 3, 2018                         MLB@Realtime Communications
                                                        October 30, 2017

                   PASSporT SHAKEN Extension (SHAKEN)
                  draft-wendt-stir-passport-shaken-01

Abstract

   This document extends PASSporT, a token object that conveys
   cryptographically-signed information about the participants involved
   in personal communications, to include information defined as part of
   the SHAKEN [ATIS-1000074] specification for indicating an attestation
   level and originating ID.

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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
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   include Simplified BSD License text as described in Section 4.e of

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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.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   2
   3.  Overview of 'shaken' PASSporT extension . . . . . . . . . . .   3
   4.  PASSporT 'attest' Claim . . . . . . . . . . . . . . . . . . .   3
   5.  PASSporT 'origid' Claim . . . . . . . . . . . . . . . . . . .   4
   6.  Example . . . . . . . . . . . . . . . . . . . . . . . . . . .   4
   7.  Using 'shaken' in SIP . . . . . . . . . . . . . . . . . . . .   5
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   5
     8.1.  JSON Web Token claims . . . . . . . . . . . . . . . . . .   5
     8.2.  PASSporT Types  . . . . . . . . . . . . . . . . . . . . .   6
   9.  Security Considerations . . . . . . . . . . . . . . . . . . .   6
   10. Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   6
   11. References  . . . . . . . . . . . . . . . . . . . . . . . . .   6
     11.1.  Normative References . . . . . . . . . . . . . . . . . .   6
     11.2.  Informative References . . . . . . . . . . . . . . . . .   7
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   7

1.  Introduction

   The SHAKEN specification defines a framework for using STIR protocols
   including PASSporT [I-D.ietf-stir-passport], RFC4474bis
   [I-D.ietf-stir-rfc4474bis] and the STIR certificate framework
   [I-D.ietf-stir-certificates] for implementing the cryptographic
   validation of an authorized originator of telephone calls using SIP.
   Because the current telephone network contains both VoIP and TDM/SS7
   originated traffic, there is many scenarios that need to be accounted
   for where PASSporT signatures may represent either direct or indirect
   call origination scenarios.  The SHAKEN [ATIS-1000074] specification
   defines levels of attribution of the origination of the call as well
   as an origination identifier that can help create a unique
   association with the origination of calls from various parts of the
   VoIP or TDM telephone network.  This document specifies these
   indicators as a specified PASSporT extension.

2.  Terminology

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in [RFC2119].

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3.  Overview of 'shaken' PASSporT extension

   The SHAKEN framework is designed to use PASSporT
   [I-D.ietf-stir-passport] as a method of asserting the telephone
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