On Fri, 1 Nov 2024 at 11:50, Bas Westerbaan <bas=
40cloudflare....@dmarc.ietf.org> wrote:

> Here we're not accounting for the new bottleneck on server upload which
> these post-quantum signatures add. But that's a bandwidth issue — not a
> compute one.
>

On top of that, the HRR/ClientHello Cookie extension already in TLS1.3 can
also provide this kind of effect: the server can require the client to echo
up to 16KB of data in its retry. This means an equivalent to the "Echo
Client Puzzle Type" in this draft is already deployable today.

Cheers,
Joe
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