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[DNSOP] Re: Collision Free Key Tags for DNSSEC draft

Peter Thomassen <peter@desec.io> Wed, 03 December 2025 17:23 UTC

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To: Philip Homburg <pch-dnsop-7@u-1.phicoh.com>, dnsop@ietf.org
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From: Peter Thomassen <peter@desec.io>
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Subject: [DNSOP] Re: Collision Free Key Tags for DNSSEC draft
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On 12/3/25 17:16, Philip Homburg wrote:
>> Avoiding them is certainly possible, but requires extra coordination.
>> It seems to me that the complexity of that is (much) larger than
>> continuing to allow ~one collision.
> 
> In my opinion this is a quality of implementation issue. We should
> not design a multi-signer protocol that has collision even if there is
> no document that requires it.
[...]
> THere is also the issue that software that stores public keys in files
> with the traditional filename scheme may have a hard time handling
> key tag collisions.

I'll quote you:
> In my opinion this is a quality of implementation issue.

;-)

Cheers,
Peter

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