[TLS] Re: 3GPP requires TLS 1.2 support to be disabled by default

Eric Rescorla <ekr.ietf@gmail.com> Wed, 02 September 2026 16:05 UTC

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From: Eric Rescorla <ekr.ietf@gmail.com>
Date: Wed, 02 Sep 2026 08:56:08 -0700
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Subject: [TLS] Re: 3GPP requires TLS 1.2 support to be disabled by default
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+1

-Ekr


On Tue, Sep 1, 2026 at 3:31 AM Martin Thomson <mt@lowentropy.net> wrote:

> Thanks for the good work you did here John.  This is a good outcome.
> Hopefully we can iron out the DTLS 1.3 bumps in a reasonable timeframe so
> that this is not just the stream variant.
>
> On Tue, Sep 1, 2026, at 09:55, John Mattsson wrote:
> > Hi,
> > 3GPP has just decided that TLS 1.2 support shall be disabled by
> > default. Hopefully, that will help phase out the remaining TLS 1.2-only
> > nodes. TLS 1.3 has been mandatory since 2018. With the urgent migration
> > to PQC, (D)TLS 1.2 is not really an option anymore. And while TLS 1.2
> > can be hardened, most TLS 1.2-only nodes are not.
> >
> > https://www.3gpp.org/ftp/Meetings_3GPP_SYNC/SA3/docs/S3-263562.zip
> >
> > Cheers,
> > John Preuß Mattsson
> >
> >
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