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Re: [TLS] Francesca Palombini's Yes on draft-ietf-tls-dtls13-41: (with COMMENT)

Sean Turner <sean@sn3rd.com> Thu, 25 March 2021 03:14 UTC

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From: Sean Turner <sean@sn3rd.com>
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Date: Wed, 24 Mar 2021 23:13:53 -0400
Cc: The IESG <iesg@ietf.org>, draft-ietf-tls-dtls13@ietf.org, TLS Chairs <tls-chairs@ietf.org>, TLS List <tls@ietf.org>
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To: Francesca Palombini <francesca.palombini@ericsson.com>
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Subject: Re: [TLS] Francesca Palombini's Yes on draft-ietf-tls-dtls13-41: (with COMMENT)
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> On Mar 24, 2021, at 13:03, Francesca Palombini via Datatracker <noreply@ietf.org> wrote:
> 
> 6. -----
> 
>   Any TLS cipher suite that is specified for use with DTLS MUST define
>   limits on the use of the associated AEAD function that preserves
>   margins for both confidentiality and integrity.  That is, limits MUST
>   be specified for the number of packets that can be authenticated and
>   for the number of packets that can fail authentication before a key
>   update is required.  Providing a reference to any analysis upon which
>   values are based - and any assumptions used in that analysis - allows
>   limits to be adapted to varying usage conditions.
> 
> FP: This seems important enough that it should be highlighted for the experts
> reviewing the registration. I see that
> https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#tls-parameters-4
> has a number of notes, maybe that would be enough, or maybe add it (as an
> update?) to RFC 8447?

Please note that an update to RFC 8447 is in the works.

spt

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