Re: [TLS] prohibit <1.2 support on 1.3+ servers (but allow clients)

Martin Thomson <martin.thomson@gmail.com> Fri, 22 May 2015 03:42 UTC

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Date: Thu, 21 May 2015 20:42:15 -0700
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From: Martin Thomson <martin.thomson@gmail.com>
To: Dave Garrett <davemgarrett@gmail.com>
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Subject: Re: [TLS] prohibit <1.2 support on 1.3+ servers (but allow clients)
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On 21 May 2015 at 20:14, Dave Garrett <davemgarrett@gmail.com>; wrote:
> I should say instead that I have not seen a change nearly on the scale of the SSL3 RFC. Those who were in the process of phasing out RC4 are still doing so at a comparable pace. Browsers were willing to accept breakage for SSL3, but they're not yet ready for RC4. In comparison it appears to have had less effect, at least so far. This will, of course, hopefully change.

There is a big difference in the baseline in both cases.  RC4 was
about half of all TLS on the web before we decided to start killing
it.  You can't shift something like that quickly.