Re: [saag] AD review of draft-iab-crypto-alg-agility-06

Nico Williams <nico@cryptonector.com> Mon, 27 July 2015 20:30 UTC

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Date: Mon, 27 Jul 2015 15:30:15 -0500
From: Nico Williams <nico@cryptonector.com>
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Subject: Re: [saag] AD review of draft-iab-crypto-alg-agility-06
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On Mon, Jul 27, 2015 at 08:17:31PM +0000, Viktor Dukhovni wrote:
> On Mon, Jul 27, 2015 at 02:40:21PM -0500, Nico Williams wrote:
> 
> > We can only forbid weak crypto in OS applications when the market share
> > of such crypto is negligible.
> 
> For the particular application in question.  Thus already for email
> we can safely forbid "export" ciphers, SSLv2 and 1DES.  
> 
> It also looks like we can also forbid SSLv3.  The most recent report
> of SSSv3-only domains on postfix-users (some banks in Western Europe)
> was in Sep 2013:

Right, because the negative impact of forbidding those is negligible.