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Hi George,

No comment on section 4.1.4, but wanted to note a mistake in your post.

On 05/09/2011 08:22 AM, George Barwood wrote:
> I have a comment about section 4.1.4.  Rollover for a Single Type Signing Key 
> rollover.
> 
> The following simple scheme  doesn't seem to be covered.
> 
> (1) Introduce new key DNS_K_2
> 
> (2) Add DS record for DNS_K_2 to parent zone.
> 
> (3) Wait for DNS_K_2 and it's DS record to propagate.
> 
> (4) Stop signing with DNS_K_2, start signing with DNS_K_1

Start signing with DNS_K_2 and stop signing with DNS_K_1

> (5) Wait for DNS_K_2 signatures to propagate.
> 
> (6) Remove DNS_K_1 from child it's DS record from parent.
> 
> This has the advantage of minimising the size of the signed DNSKEY response,
> to 2 x DNSKEY and 1 x RRSIG, and doesn't involve double signatures.
> 
> It is double-DS, but given that DS records are relatively small, this may be 
> a lesser consideration,
> whereas the size of the DNSKEY response is most likely to be affected by 
> fragmentation/TCP fallback
> considerations.

Best regards,
   Wouter
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