Re: [TLS] Roman Danyliw's No Objection on draft-ietf-tls-grease-03: (with COMMENT)

"Martin Thomson" <mt@lowentropy.net> Thu, 22 August 2019 00:02 UTC

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Date: Thu, 22 Aug 2019 10:02:01 +1000
From: "Martin Thomson" <mt@lowentropy.net>
To: "David Benjamin" <davidben=40google.com@dmarc.ietf.org>, "Roman Danyliw" <rdd@cert.org>
Cc: draft-ietf-tls-grease@ietf.org, "<tls@ietf.org>" <tls@ietf.org>, "The IESG" <iesg@ietf.org>, tls-chairs <tls-chairs@ietf.org>
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Subject: Re: [TLS] =?utf-8?q?Roman_Danyliw=27s_No_Objection_on_draft-ietf-tls?= =?utf-8?q?-grease-03=3A_=28with_COMMENT=29?=
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On Thu, Aug 22, 2019, at 07:44, David Benjamin wrote:
>  That clause was meant to be descriptive of the other bits of the 
> document. "[Such-and-such] may not be [such-and-such]ed, so [some 
> consequence of this]". Using "must not" reads odd to me: "GREASE values 
> must not be negotiated, so they do not directly impact the security of 
> TLS connections."

Perhaps what you are looking for is "cannot": "GREASE values cannot be negotiated, ..."