[TLS] [Editorial Errata Reported] RFC8446 (6126)

RFC Errata System <rfc-editor@rfc-editor.org> Fri, 24 April 2020 09:41 UTC

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Subject: [TLS] [Editorial Errata Reported] RFC8446 (6126)
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The following errata report has been submitted for RFC8446,
"The Transport Layer Security (TLS) Protocol Version 1.3".

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You may review the report below and at:
https://www.rfc-editor.org/errata/eid6126

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Type: Editorial
Reported by: Ben Smyth <research@bensmyth.com>

Section: 4.1.1

Original Text
-------------
Note that if the PSK can be used without (EC)DHE, then
non-overlap in the "supported_groups" parameters need not be fatal, 
as it is in the non-PSK case discussed in the previous paragraph.

Corrected Text
--------------
Note that if the PSK can be used without (EC)DHE, then
non-overlap in the "supported_groups" parameters need not be fatal, 
as it is in the non-PSK case discussed in the previous paragraph, 
because PSK-only key exchange mode does not need supported_groups.

Notes
-----
If "the PSK can be used without (EC)DHE", then PSK-only key exchange mode can be used, which doesn't require supported_groups. This is perhaps worthy of explanation.

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RFC8446 (draft-ietf-tls-tls13-28)
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Title               : The Transport Layer Security (TLS) Protocol Version 1.3
Publication Date    : August 2018
Author(s)           : E. Rescorla
Category            : PROPOSED STANDARD
Source              : Transport Layer Security
Area                : Security
Stream              : IETF
Verifying Party     : IESG