PASSporT Extension for Rich Call Data
draft-ietf-stir-passport-rcd-06

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Last updated 2020-03-09
Replaces draft-peterson-stir-cnam
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Network Working Group                                        J. Peterson
Internet-Draft                                              Neustar Inc.
Intended status: Standards Track                                C. Wendt
Expires: September 10, 2020                                      Comcast
                                                          March 09, 2020

                 PASSporT Extension for Rich Call Data
                    draft-ietf-stir-passport-rcd-06

Abstract

   This document extends PASSporT, a token for conveying
   cryptographically-signed call information about personal
   communications, to include rich data that can be transmitted and
   subsequently rendered to users, extending identifying information
   beyond human-readable display name comparable to the "Caller ID"
   function common on the telephone network.  The element defined for
   this purpose, Rich Call Data (RCD), is an extensible object defined
   to either be used as part of STIR or with SIP Call-Info to include
   related information about calls that helps people decide whether to
   pick up the phone.  This signing of the RCD information is also
   enhanced with an integrity mechanism to optionally protect the
   handling of this information between authoritative and non-
   authoritative parties authoring and signing the Rich Call Data for
   support of different usage and content policies.

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 10, 2020.

Peterson & Wendt       Expires September 10, 2020               [Page 1]
Internet-Draft                     RCD                        March 2020

Copyright Notice

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   document authors.  All rights reserved.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Overview of the use of the Rich Call Data PASSporT extension    4
   4.  Overview of Rich Call Data integrity  . . . . . . . . . . . .   5
   5.  PASSporT Claims . . . . . . . . . . . . . . . . . . . . . . .   5
     5.1.  PASSporT "rcd" Claim  . . . . . . . . . . . . . . . . . .   5
       5.1.1.  "nam" key . . . . . . . . . . . . . . . . . . . . . .   6
       5.1.2.  "jcd" key . . . . . . . . . . . . . . . . . . . . . .   6
       5.1.3.  "jcl" key . . . . . . . . . . . . . . . . . . . . . .   6
       5.1.4.  "rcdi" RCD integrity Claim  . . . . . . . . . . . . .   6
       5.1.5.  Creation of the "rcd" digest  . . . . . . . . . . . .   7
       5.1.6.  JWT Constraint for "rcdi" claim . . . . . . . . . . .   8
     5.2.  PASSporT "crn" claim - Call Reason  . . . . . . . . . . .   9
   6.  "rcd" and "crn" Claims Usage  . . . . . . . . . . . . . . . .   9
     6.1.  Example "rcd" PASSporTs . . . . . . . . . . . . . . . . .   9
   7.  Compact form of "rcd" PASSporT  . . . . . . . . . . . . . . .  11
     7.1.  Compact form of the "rcd" PASSporT claim  . . . . . . . .  11
     7.2.  Compact form of the "rcdi" PASSporT claim . . . . . . . .  12
     7.3.  Compact form of the "crn" PASSporT claim  . . . . . . . .  12
   8.  Further Information Associated with Callers . . . . . . . . .  12
   9.  Third-Party Uses  . . . . . . . . . . . . . . . . . . . . . .  13
     9.1.  Signing as a Third Party  . . . . . . . . . . . . . . . .  14
   10. Levels of Assurance . . . . . . . . . . . . . . . . . . . . .  15
   11. Using "rcd" in SIP  . . . . . . . . . . . . . . . . . . . . .  15
     11.1.  Authentication Service Behavior  . . . . . . . . . . . .  15
     11.2.  Verification Service Behavior  . . . . . . . . . . . . .  16
   12. Using "rcd" as additional claims to other PASSporT extensions  17
     12.1.  Procedures for applying "rcd" as claims only . . . . . .  17
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