Re: [DNSOP] key lengths for DNSSEC

Evan Hunt <each@isc.org> Wed, 02 April 2014 16:55 UTC

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Date: Wed, 2 Apr 2014 16:54:53 +0000
From: Evan Hunt <each@isc.org>
To: Ted Lemon <ted.lemon@nominum.com>
Message-ID: <20140402165453.GA34207@isc.org>
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Cc: IETF DNSOP WG <dnsop@ietf.org>, Joe Abley <jabley@hopcount.ca>
Subject: Re: [DNSOP] key lengths for DNSSEC
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On Wed, Apr 02, 2014 at 11:33:20AM -0400, Ted Lemon wrote:
> Bear in mind that all you _really_ have to do is get a bogus ZSK with the
> current time into the resolver, which you may be able to do with some
> clever NTP shenanigans over a relatively short timescale.   But yeah,
> this isn't likely to be useful except in cases where a device has been
> powered off, doesn't have an accurate battery-backed-up clock, and does
> DNSSEC, which is a weird set of circumstances.

I predict that will be a less weird set of circumstances in a year or
so: dnsmasq now has DNSSEC validation in beta.

(Tony Finch has a nifty idea to replace ntpdate with a quorum of tlsdate
responses; it might still be subvertible but it would be a much harder
nut to crack. https://git.csx.cam.ac.uk/x/ucs/u/fanf2/temporum.git)

-- 
Evan Hunt -- each@isc.org
Internet Systems Consortium, Inc.