I'll take the liberty to resend Mark's messages too;

Resending Mark's reply to Dean Anderson's message

-------- Original Message --------
Subject: Re: [DNSOP] suggestion for 4641bis: key algorithm rollover section
Date: Fri, 05 Sep 2008 09:35:43 +1000
From: Mark Andrews <[EMAIL PROTECTED]>
To: Dean Anderson <[EMAIL PROTECTED]>
CC: Jelte Jansen <[EMAIL PROTECTED]>, [email protected]


> On Thu, 4 Sep 2008, Mark Andrews wrote:
> 
> > 
> >     It's not a issue.  You remove the DS's which have that
> >     algorithm then once they have expired from caches you can
> >     remove the DNSKEY.
> 
> Of course, you can replay them, resulting in a DOS.  (I'll call 
> this attack 6)

        Wait for the signatures to also expire.  The replayed DS
        RRset will then be rejected.  Pick your paranoia level.

        Mark
-- 
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: [EMAIL PROTECTED]
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