Persona Assertion Token
draft-ietf-stir-passport-00

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Last updated 2016-02-22
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STIR                                                       C. Wendt, Ed.
Internet-Draft                                                   Comcast
Intended status: Standards Track                             J. Peterson
Expires: August 24, 2016                                    Neustar Inc.
                                                       February 21, 2016

                        Persona Assertion Token
                      draft-ietf-stir-passport-00

Abstract

   This document defines a token format for verifying with non-
   repudiation the sender of and authorization to send information
   related to the originator of personal communications.  A
   cryptographic signature is defined to protect the integrity of the
   information used to identify the originator of a personal
   communications session toward a terminating entity.  The
   cryptographic signature is defined with the intention that it can
   confidently verify the originating persona even when the signature is
   sent to the terminating party over a potentially unsecure channel.
   The Persona Assertion Token (PASSporT) is particularly useful for
   many personal communications applications over IP networks and other
   multi-hop interconnection scenarios where the originating and
   terminating parties may not have a direct trusted relationship.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
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   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on August 24, 2016.

Copyright Notice

   Copyright (c) 2016 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Wendt & Peterson         Expires August 24, 2016                [Page 1]
Internet-Draft                  PASSporT                   February 2016

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://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
   2.  Token Overview  . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  PASSporT Definition . . . . . . . . . . . . . . . . . . . . .   3
     3.1.  PASSporT Header . . . . . . . . . . . . . . . . . . . . .   4
       3.1.1.  "typ" (Type) Header Parameter . . . . . . . . . . . .   4
       3.1.2.  "alg" (Algorithm) Header Parameter  . . . . . . . . .   4
       3.1.3.  "x5u" (X.509 URL) Header Parameter  . . . . . . . . .   4
     3.2.  PASSporT Token Claim  . . . . . . . . . . . . . . . . . .   5
     3.3.  PASSporT Signature  . . . . . . . . . . . . . . . . . . .   5
   4.  Extending PASSporT  . . . . . . . . . . . . . . . . . . . . .   6
     4.1.  "ppt" (PASSporT) header parameter . . . . . . . . . . . .   6
     4.2.  Extended PASSporT Claims  . . . . . . . . . . . . . . . .   6
     4.3.  Alternate PASSporT Extension  . . . . . . . . . . . . . .   7
     4.4.  Registering PASSporT Extensions . . . . . . . . . . . . .   7
   5.  Deterministic JSON Serialization  . . . . . . . . . . . . . .   7
   6.  Human Readability . . . . . . . . . . . . . . . . . . . . . .   7
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .   8
     7.1.  Avoidance of replay and cut and paste attacks . . . . . .   8
     7.2.  Solution Considerations . . . . . . . . . . . . . . . . .   8
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   9
     8.1.  Media Type Registration . . . . . . . . . . . . . . . . .   9
       8.1.1.  Media Type Registry Contents Additions Requested  . .   9
     8.2.  JSON Web Token Claims Registration  . . . . . . . . . . .  10
       8.2.1.  Registry Contents Additions Requested . . . . . . . .  10
   9.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  10
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .  11
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  12

1.  Introduction

   In today's IP-enabled telecommunications world, there is a growing
   concern about the ability to trust incoming invitations for
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