Subject: Re: [TLS] I-D Action: draft-ietf-tls-exported-authenticator-04.txt

From: Nick Sullivan <[email-masked]>
Date: Wed, 15 Nov 2017 12:25:14 +0000

After some discussion on Github leading up to IETF 100, we discovered a few
drawbacks of the current draft that can be addressed by the following
change:
https://github.com/tlswg/tls-exported-authenticator/pull/9

The change introduces the concept of an *authenticator request,* which is
based on the CertificateRequest message in TLS. This change is motivated by
the following goals:
- Provide a way to bind authenticators to requests
- Move the certificate and extension selection logic from the application
into the TLS library, where code and logic can be reused

A consequence of this change is that it no longer allows "spontaneous"
client authentication, which did not have a compelling use case to begin
with.

Nick

On Tue, Oct 31, 2017 at 5:46 AM <[email-masked]> wrote:

>
> A New Internet-Draft is available from the on-line Internet-Drafts
> directories.
> This draft is a work item of the Transport Layer Security WG of the IETF.
>
>         Title           : Exported Authenticators in TLS
>         Author          : Nick Sullivan
>         Filename        : draft-ietf-tls-exported-authenticator-04.txt
>         Pages           : 7
>         Date            : 2017-10-30
>
> Abstract:
>    This document describes a mechanism in Transport Layer Security (TLS)
>    to provide an exportable proof of ownership of a certificate that can
>    be transmitted out of band and verified by the other party.
>
>
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-ietf-tls-exported-authenticator/
>
> There are also htmlized versions available at:
> https://tools.ietf.org/html/draft-ietf-tls-exported-authenticator-04
>
> https://datatracker.ietf.org/doc/html/draft-ietf-tls-exported-authenticator-04
>
> A diff from the previous version is available at:
> https://www.ietf.org/rfcdiff?url2=draft-ietf-tls-exported-authenticator-04
>
>
> Please note that it may take a couple of minutes from the time of
> submission
> until the htmlized version and diff are available at tools.ietf.org.
>
> Internet-Drafts are also available by anonymous FTP at:
> ftp://ftp.ietf.org/internet-drafts/
>
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