Yes, this line has confused me as well.

Cheers,

Andrei

From: TLS [mailto:tls-boun...@ietf.org] On Behalf Of William Whyte
Sent: Tuesday, November 1, 2016 1:42 AM
To: Nick Sullivan <nicholas.sulli...@gmail.com>
Cc: tls@ietf.org
Subject: Re: [TLS] draft-sullivan-tls-exported-authenticator-00

I'm confused by the line "These messages are not encrypted", because on a plain 
reading it could mean that the authenticator is sent outside the encrypted TLS 
session. That would be bad because it would mean that clients that wanted to 
authenticate themselves but to the server only wouldn't be able to use this 
mechanism. I assume that's not the intent? If that isn't the intent, suggest 
rephrasing as "These messages are not encrypted, other than the encryption 
provided on transmission by the TLS session".

Cheers,

William

On Mon, Oct 31, 2016 at 5:29 PM, Nick Sullivan 
<nicholas.sulli...@gmail.com<mailto:nicholas.sulli...@gmail.com>> wrote:
<https://tools.ietf.org/html/<https://tools.ietf.org/html/draft-sullivan-tls-exported-authenticator-00>draft-sullivan-tls-exported-authenticator-00><https://tools.ietf.org/html/draft-sullivan-tls-exported-authenticator-00>
I just posted a new Internet-Draft called "Exported Authenticators in TLS" in 
the TLS working group.

The intent of this draft is to enable participants in a TLS connection to prove 
ownership of additional certificates. This differs from previous proposals 
(https://tools.ietf.org/html/draft-sullivan-tls-post-handshake-auth-00) in that 
these proofs are not sent as part of the TLS connection, but instead exported 
so that they can be sent out of band (as part of an application layer message, 
for example).

This proposal should enable a radical simplification of the Secondary 
Certificate Authentication in HTTP/2 proposal 
(https://tools.ietf.org/html/draft-bishop-httpbis-http2-additional-certs-01), 
and should generally be a useful tool for binding a certificate ownership proof 
to a TLS connection.
Nick Sullivan

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