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Re: [DNSOP] Robert Wilton's No Objection on draft-ietf-dnsop-dns-zone-digest-12: (with COMMENT)

"Wessels, Duane" <dwessels@verisign.com> Fri, 09 October 2020 20:33 UTC

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From: "Wessels, Duane" <dwessels@verisign.com>
To: Ben Schwartz <bemasc@google.com>
CC: "Wessels, Duane" <dwessels=40verisign.com@dmarc.ietf.org>, Robert Wilton <rwilton@cisco.com>, "draft-ietf-dnsop-dns-zone-digest@ietf.org" <draft-ietf-dnsop-dns-zone-digest@ietf.org>, Tim Wicinski <tjw.ietf@gmail.com>, "dnsop@ietf.org" <dnsop@ietf.org>, "dnsop-chairs@ietf.org" <dnsop-chairs@ietf.org>, The IESG <iesg@ietf.org>
Thread-Topic: [EXTERNAL] [DNSOP] Robert Wilton's No Objection on draft-ietf-dnsop-dns-zone-digest-12: (with COMMENT)
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Date: Fri, 09 Oct 2020 20:33:10 +0000
Message-ID: <21706EBD-97D3-4312-9D7F-30FA0F99B95F@verisign.com>
References: <160215590178.19643.8185294724542473578@ietfa.amsl.com> <514C5EA8-2814-42AA-9787-455445BA828D@verisign.com> <CAHbrMsCxwM_bbu6tO97KkH5rk5DKag5_4FsY3faAbgg=M1-CoQ@mail.gmail.com>
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Subject: Re: [DNSOP] Robert Wilton's No Objection on draft-ietf-dnsop-dns-zone-digest-12: (with COMMENT)
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> On Oct 9, 2020, at 12:08 PM, Ben Schwartz <bemasc@google.com> wrote:
> 
> 
> 6.2.  Use of Multiple ZONEMD Hash Algorithms
> 
>    When a zone publishes multiple ZONEMD RRs, the overall security is
>    only as good as the weakest hash algorithm in use.
> 
> Why not require recipients to verify all digests with recognized algorithms?
> 

That text stating that one is sufficient was based on a conversation in the working group that started here:

https://mailarchive.ietf.org/arch/msg/dnsop/RFCklH7Lx00bL-tOVRCAc0j5ftw/


DW

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