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Re: [TLS] Working Group Last Call for draft-ietf-tls-downgrade-scsv-00

Hubert Kario <hkario@redhat.com> Thu, 16 October 2014 10:36 UTC

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Date: Thu, 16 Oct 2014 06:36:07 -0400
From: Hubert Kario <hkario@redhat.com>
To: Bodo Moeller <bmoeller@acm.org>
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Thread-Topic: Working Group Last Call for draft-ietf-tls-downgrade-scsv-00
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Subject: Re: [TLS] Working Group Last Call for draft-ietf-tls-downgrade-scsv-00
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----- Original Message -----

> From: "Bodo Moeller" <bmoeller@acm.org>
> To: tls@ietf.org
> Sent: Wednesday, 15 October, 2014 2:59:59 PM
> Subject: Re: [TLS] Working Group Last Call for
> draft-ietf-tls-downgrade-scsv-00

> Hanno Böck < hanno@hboeck.de > :

> > Can you quantify that tradeoff? How many devices are there really out
> 
> > there that would break? I'd like to have this discussions with
> 
> > hard numbers.
> 

> Finding hard numbers is, well, hard. In general, you find out the whole
> picture about what you've broken only after you've broken it.

> That doesn't mean that people aren't trying to get good estimates (Ivan
> Ristic has done some data collection -- I've include some of his results in
> slide 2 of http://www.ietf.org/proceedings/90/slides/slides-90-tls-0.pdf )

nice 
so ~1% is intolerant to TLS1.1 
~1% is intolerant to 1.2 
and 11% is intolerant to 1.3 (!!) 

were there any servers intolerant to TLS1.0? 

-- 
Regards, 
Hubert Kario

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