Persona Assertion Token
draft-ietf-stir-passport-02

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Last updated 2016-05-24
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STIR                                                            C. Wendt
Internet-Draft                                                   Comcast
Intended status: Standards Track                             J. Peterson
Expires: November 25, 2016                                  Neustar Inc.
                                                            May 24, 2016

                        Persona Assertion Token
                      draft-ietf-stir-passport-02

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 (e.g. the telephone number or URI) and verify
   the accuracy of this information at the destination.  The
   cryptographic signature is defined with the intention that it can
   confidently verify the originating persona even when the signature is
   sent to the destination party over an 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 destination
   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
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   This Internet-Draft will expire on November 25, 2016.

Wendt & Peterson        Expires November 25, 2016               [Page 1]
Internet-Draft                  PASSporT                        May 2016

Copyright Notice

   Copyright (c) 2016 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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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Token Overview  . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  PASSporT Definition . . . . . . . . . . . . . . . . . . . . .   4
     3.1.  PASSporT Header . . . . . . . . . . . . . . . . . . . . .   4
       3.1.1.  "typ" (Type) Header Parameter . . . . . . . . . . . .   4
       3.1.2.  "alg" (Algorithm) Header Parameter  . . . . . . . . .   5
       3.1.3.  "x5u" (X.509 URL) Header Parameter  . . . . . . . . .   5
     3.2.  PASSporT Payload  . . . . . . . . . . . . . . . . . . . .   5
       3.2.1.  JWT defined claims  . . . . . . . . . . . . . . . . .   5
         3.2.1.1.  "iat" - Issued at claim . . . . . . . . . . . . .   6
       3.2.2.  PASSporT specific claims  . . . . . . . . . . . . . .   6
         3.2.2.1.  Originating and Destination Identities  . . . . .   6
         3.2.2.2.  "mky" - Media Key claim . . . . . . . . . . . . .   7
       3.2.3.  Multi-party Communications  . . . . . . . . . . . . .   8
     3.3.  PASSporT Signature  . . . . . . . . . . . . . . . . . . .   8
   4.  Extending PASSporT  . . . . . . . . . . . . . . . . . . . . .   8
     4.1.  "ppt" (PASSporT) header parameter . . . . . . . . . . . .   8
     4.2.  Extended PASSporT Claims  . . . . . . . . . . . . . . . .   9
     4.3.  Alternate PASSporT Extension  . . . . . . . . . . . . . .   9
     4.4.  Registering PASSporT Extensions . . . . . . . . . . . . .   9
   5.  Deterministic JSON Serialization  . . . . . . . . . . . . . .   9
     5.1.  Example PASSport deterministic JSON form  . . . . . . . .  10
   6.  Human Readability . . . . . . . . . . . . . . . . . . . . . .  10
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .  10
     7.1.  Avoidance of replay and cut and paste attacks . . . . . .  10
     7.2.  Solution Considerations . . . . . . . . . . . . . . . . .  11
     7.3.  Privacy Considerations  . . . . . . . . . . . . . . . . .  11
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  12
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