Persona Assertion Token
draft-ietf-stir-passport-06

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Last updated 2016-08-22
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STIR                                                            C. Wendt
Internet-Draft                                                   Comcast
Intended status: Standards Track                             J. Peterson
Expires: February 23, 2017                                  Neustar Inc.
                                                         August 22, 2016

                        Persona Assertion Token
                      draft-ietf-stir-passport-06

Abstract

   This document defines a canonical string object or 'token' for
   verifying with non-repudiation the author of the token, their
   authority to author the token and, minimally, the asserted
   originating identity or persona contained within the token
   corresponding specifically to the originator of 'personal
   communications', or any signalled communications between a set of
   parties with identities.  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 assertion of the identity 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 insecure
   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 February 23, 2017.

Wendt & Peterson        Expires February 23, 2017               [Page 1]
Internet-Draft                  PASSporT                     August 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.  PASSporT Token Overview . . . . . . . . . . . . . . . . . . .   3
   3.  PASSporT Components . . . . . . . . . . . . . . . . . . . . .   4
     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 Payload  . . . . . . . . . . . . . . . . . . . .   5
       3.2.1.  JWT defined claims  . . . . . . . . . . . . . . . . .   5
         3.2.1.1.  "iat" - Issued At claim . . . . . . . . . . . . .   5
       3.2.2.  PASSporT specific claims  . . . . . . . . . . . . . .   5
         3.2.2.1.  Originating and Destination Identity Claims . . .   5
         3.2.2.2.  "mky" - Media Key claim . . . . . . . . . . . . .   7
     3.3.  PASSporT Signature  . . . . . . . . . . . . . . . . . . .   8
   4.  Extending PASSporT  . . . . . . . . . . . . . . . . . . . . .   8
     4.1.  "ppt" (PASSporT) header parameter . . . . . . . . . . . .   8
     4.2.  Extended PASSporT Claims  . . . . . . . . . . . . . . . .   9
   5.  Deterministic JSON Serialization  . . . . . . . . . . . . . .   9
     5.1.  Example PASSport deterministic JSON form  . . . . . . . .  10
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .  10
     6.1.  Avoidance of replay and cut and paste attacks . . . . . .  10
     6.2.  Solution Considerations . . . . . . . . . . . . . . . . .  10
     6.3.  Privacy Considerations  . . . . . . . . . . . . . . . . .  11
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  11
     7.1.  Media Type Registration . . . . . . . . . . . . . . . . .  11
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