Re: [DNSOP] DNSKEY Flags vs. CDS/CDNSKEY

Paul Wouters <paul@cypherpunks.ca> Fri, 07 February 2014 23:31 UTC

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Date: Fri, 7 Feb 2014 18:30:59 -0500 (EST)
From: Paul Wouters <paul@cypherpunks.ca>
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To: Mukund Sivaraman <muks@isc.org>
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Cc: dnsop <dnsop@ietf.org>
Subject: Re: [DNSOP] DNSKEY Flags vs. CDS/CDNSKEY
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On Sat, 8 Feb 2014, Mukund Sivaraman wrote:

> Did you see my reply to your email a few weeks ago where I asked why new
> CDS/CDNSKEY RR types are required instead of adding a new bit to the
> Flags field of the DNSKEY RR.

That does not allow prepublishing of DS records for DNSKEY's not
published in the zone yet, which is a strategy for publishing an
emergency rollover key at the parent in case of a compromise of
the signer. This key can be completely offline and even the public
key part unknown to any party.

Paul