TLS 1.3 supports certificate-based client auth in the primary handshake.

-Ekr


On Fri, Jan 14, 2022 at 8:19 AM Urmas Vanem <urmas.va...@octox.eu> wrote:

> Hello!
>
>
>
> TLS 1.3 introduces post-handshake authentication. It relies on
> client/browser, client/browser must send post_handshake_auth extension to
> server before it can work. I hope I understood it correctly.
>
> But today we know only Firefox from popular browsers support this
> extension (and not by default).
>
>
>
> Question: How can I implement certificate based client authentication
> against web server in TLS 1.3 only environment, if browsers do not support
> post_handshake_auth extension.
>
>
>
> I have open discussion with one big software company. Can you please share
> your opinion/recommendation here regarding to the issue?
>
>
>
> Thanks in advance,
>
>
>
> Urmas
>
>
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