Re: [DNSOP] how to delete obsolete DS for obsolete DNSKEY using CDS/CDNSKEY

Doug Barton <dougb@dougbarton.us> Fri, 07 February 2014 18:12 UTC

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Date: Fri, 07 Feb 2014 10:12:37 -0800
From: Doug Barton <dougb@dougbarton.us>
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Cc: dnsop <dnsop@ietf.org>
Subject: Re: [DNSOP] how to delete obsolete DS for obsolete DNSKEY using CDS/CDNSKEY
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On 02/06/2014 11:13 AM, Warren Kumari wrote:
> This means that you can use this to update / replace / remove existing
> DS records (if you have keys A, B, C and D and want to stop using C,
> you simply publish A, B, D), but you cannot remove*all*  DS records /
> go unsigned.

If we're willing to allow zones to go from unsigned to signed via CDS, 
why not go from signed to unsigned? Both situations represent DOS 
vectors via MITM.

Doug