Re: [Acme] 2nd working group call for adoption

"Owen Friel (ofriel)" <ofriel@cisco.com> Mon, 25 October 2021 06:08 UTC

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From: "Owen Friel (ofriel)" <ofriel@cisco.com>
To: Martin Thomson <mt@lowentropy.net>, "acme@ietf.org" <acme@ietf.org>
Thread-Topic: [Acme] 2nd working group call for adoption
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Date: Mon, 25 Oct 2021 06:08:41 +0000
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Subject: Re: [Acme] 2nd working group call for adoption
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-----Original Message-----
From: Martin Thomson <mt@lowentropy.net> 
Sent: 18 October 2021 09:46
To: Owen Friel (ofriel) <ofriel@cisco.com>; acme@ietf.org
Subject: Re: [Acme] 2nd working group call for adoption

On Fri, Oct 15, 2021, at 18:00, Owen Friel (ofriel) wrote:
> Not sure why "domainNamespace" is used as the field when "subdomains" 
> is shorter and easier to understand.
>
>
> [ofriel] there was early discussion on the mailer about what exactly a 
> 'subdomain' meant. So we quoted the CA/B Browser baseline definitions 
> and used that terminology instead.  Note that the draft is not 
> restricted to web use cases, so basing terminology on CA/B is not by 
> any means mandatory. I have no strong preference on what we call the 
> field at all -  subdomains and namespaces are both used in the draft, 
> so happy to change to whatever is clearest.

RFC 8499:

   Subdomain:  "A domain is a subdomain of another domain if it is
      contained within that domain.

I found "namespaces" confusing.  I don't think we need to borrow CA/BF obfuscations.

[ofriel] As section https://datatracker.ietf.org/doc/html/draft-friel-acme-subdomains-05#section-7.1 already explicitly states that this draft is not restricted to Web PKI use cases and CA/B policy, and is equally applicable to e.g. IoT use cases or Private CA use cases, it makes sense to stick to generic IETF RFC 8499 terminology, and use that to define subdomain. 

And even though the appendix explicitly references version 1.7.1 of the CA/B reqs, its probably worth deleting that appendix completely, as its already out of date.