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Re: [Acme] ALPN based TLS challenge

Martin Thomson <martin.thomson@gmail.com> Fri, 23 February 2018 04:31 UTC

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From: Martin Thomson <martin.thomson@gmail.com>
Date: Fri, 23 Feb 2018 15:31:54 +1100
Message-ID: <CABkgnnVgFN57OeuN61rHa9i7teo_TGyA1CNXiQz0n4KcQ=O78Q@mail.gmail.com>
To: Roland Bracewell Shoemaker <roland@letsencrypt.org>
Cc: IETF ACME <acme@ietf.org>
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Subject: Re: [Acme] ALPN based TLS challenge
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Now is probably the time to publish in internet-draft form:
https://datatracker.ietf.org/submit/

On Fri, Feb 23, 2018 at 12:48 PM, Roland Bracewell Shoemaker
<roland@letsencrypt.org> wrote:
> Hey all,
>
> After the issues with the SNI based TLS challenges were discovered there was interest from a number of parties in developing another challenge that did validation at the TLS layer. After some discussion about possibilities we’ve come up with a new challenge type based on ALPN which we believe provides the required security properties which the SNI based methods did not have.
>
> I’ve attached the rough draft of a document which defines this new method and lays out the security considerations and design rationale for it. Given the interest in getting a new TLS method specified would the WG chairs be amenable to directly adopting this as a WG work product (assuming there is consensus on list) so that we can start work on it or is it required to be submitted as a individual draft first?
>
> Happy to field any questions about the details. I’d also like to thank everyone who provided initial input and editorial opinions on this.
>
> Thanks,
> Roland
>
>
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