Re: [TLS] The future of external PSK in TLS 1.3

Pascal Urien <pascal.urien@gmail.com> Thu, 24 September 2020 14:39 UTC

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From: Pascal Urien <pascal.urien@gmail.com>
Date: Thu, 24 Sep 2020 16:38:58 +0200
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To: Filippo Valsorda <filippo@ml.filippo.io>
Cc: Peter Gutmann <pgut001@cs.auckland.ac.nz>, Hannes Tschofenig <Hannes.Tschofenig@arm.com>, Carrick Bartle <cbartle891@icloud.com>, "tls@ietf.org" <tls@ietf.org>
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Subject: Re: [TLS] The future of external PSK in TLS 1.3
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Hi all

Payment terminal use TLS (see for example
https://www.pcisecuritystandards.org/documents/Use-of-SSL-Early-TLS-for-POS-POI-Connections.docx
)

They are not WEB browser...may be IoT devices ? because they are connected



Le jeu. 24 sept. 2020 à 16:12, Filippo Valsorda <filippo@ml.filippo.io> a
écrit :

> 2020-09-24 12:02 GMT+02:00 Peter Gutmann <pgut001@cs.auckland.ac.nz>nz>:
>
> Taking "SCADA/IoT/etc" to be a placeholder for M2M or more
> generally "non-web use", [...]
>
>
> "The web" and "resource-constrained use cases which can't afford ECDH"
> feels like a false dichotomy, and it sounds unlikely that most M2M cases
> would fit the latter description.
>
> Anyway, David has made a better case than I did for marking psk_ke as N,
> like TLS_PSK_WITH_AES_128_GCM_SHA256 already is, so I don't want to
> distract from that thread.
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