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

David Benjamin <davidben@google.com> Thu, 22 August 2019 15:04 UTC

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From: David Benjamin <davidben@google.com>
Date: Thu, 22 Aug 2019 11:03:50 -0400
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To: Roman Danyliw <rdd@cert.org>
Cc: Martin Thomson <mt@lowentropy.net>, David Benjamin <davidben=40google.com@dmarc.ietf.org>, "draft-ietf-tls-grease@ietf.org" <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] Roman Danyliw's No Objection on draft-ietf-tls-grease-03: (with COMMENT)
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On Wed, Aug 21, 2019 at 11:18 PM Roman Danyliw <rdd@cert.org>; wrote:

>
>
> > -----Original Message-----
> > From: Martin Thomson [mailto:mt@lowentropy.net]
> > Sent: Wednesday, August 21, 2019 8:02 PM
> > 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>;
> > Subject: Re: [TLS] Roman Danyliw's No Objection on
> draft-ietf-tls-grease-03:
> > (with COMMENT)
> >
> > 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, ..."
>
> A "cannot" would make sense to me.
>

"cannot" it is! :-)

David