As promised at the last interim meeting, I’ve sat down and put together a first 
strawman for PoP tokens using HTTP Message Signatures. As you can see, it’s 
pretty short. I’ve intentionally scoped it down to only pre-registered keys 
(unlike DPoP’s dynamically presented keys), but this could change. I haven’t 
put in the pieces for token key confirmation that would be required for this 
work, which both the MTLS and DPoP drafts have.

 — Justin

> Begin forwarded message:
> 
> From: internet-dra...@ietf.org
> Subject: New Version Notification for draft-richer-oauth-httpsig-00.txt
> Date: June 21, 2021 at 11:52:14 AM EDT
> To: "Justin Richer" <i...@justin.richer.org>
> 
> 
> A new version of I-D, draft-richer-oauth-httpsig-00.txt
> has been successfully submitted by Justin Richer and posted to the
> IETF repository.
> 
> Name:         draft-richer-oauth-httpsig
> Revision:     00
> Title:                OAuth Proof of Possession Tokens with HTTP Message 
> Signatures
> Document date:        2021-06-21
> Group:                Individual Submission
> Pages:                8
> URL:            
> https://www.ietf.org/archive/id/draft-richer-oauth-httpsig-00.txt
> Status:         https://datatracker.ietf.org/doc/draft-richer-oauth-httpsig/
> Html:           
> https://www.ietf.org/archive/id/draft-richer-oauth-httpsig-00.html
> Htmlized:       
> https://datatracker.ietf.org/doc/html/draft-richer-oauth-httpsig
> 
> 
> Abstract:
>   This extension to the OAuth 2.0 authorization framework defines a
>   method for using HTTP Message Signatures to bind access tokens to
>   keys held by OAuth 2.0 clients.
> 
> 
> 
> 
> The IETF Secretariat
> 
> 

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