Multi-Subject JSON Web Token (JWT)
draft-yusef-oauth-nested-jwt-04

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OAuth Working Group                                       R. Shekh-Yusef
Internet-Draft                                                     Auth0
Intended status: Standards Track                          March 10, 2021
Expires: September 11, 2021

                   Multi-Subject JSON Web Token (JWT)
                    draft-yusef-oauth-nested-jwt-04

Abstract

   This specification defines a mechanism for including multiple
   subjects in a JWT.  A primary subject in an enclosing JWT with its
   own claims, and a related subject in a nested JWT with its own
   claims.

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   This Internet-Draft will expire on September 11, 2021.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Use Cases . . . . . . . . . . . . . . . . . . . . . . . . . .   3
     2.1.  Primary Subject with Secondary Authority Subject  . . . .   3
     2.2.  Multiple Primary Subjects . . . . . . . . . . . . . . . .   3
     2.3.  Delegation of Authority . . . . . . . . . . . . . . . . .   3
     2.4.  Replaced Primary Subjects . . . . . . . . . . . . . . . .   4
       2.4.1.  STIR  . . . . . . . . . . . . . . . . . . . . . . . .   4
       2.4.2.  Network Service Mesh (NSM)  . . . . . . . . . . . . .   4
   3.  JWT Content . . . . . . . . . . . . . . . . . . . . . . . . .   4
   4.  Example . . . . . . . . . . . . . . . . . . . . . . . . . . .   5
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .   5
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   5
   7.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .   5
   8.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   5
     8.1.  Normative References  . . . . . . . . . . . . . . . . . .   5
     8.2.  Informative References  . . . . . . . . . . . . . . . . .   6
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .   6

1.  Introduction

   JSON Web Token (JWT) [RFC7519] is a mechanism that is used to
   transfer claims between two parties across security domains.  Nested
   JWT is a JWT in which the payload is another JWT.  The current
   specification does not define a means by which the enclosing JWT
   could have its own Claims Set, only the enclosed JWT would have
   claims.

   There are a number of use cases where there is a need to represent
   multiple related subjects in one JWT; a primary subject and a related
   secondary subject.

   This specification defines a mechanism for including multiple
   subjects in a JWT.  A primary subject in an enclosing JWT with its

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