Cloudflare Research: Post-Quantum Key Agreement
On essentially all domains served through Cloudflare, including this one, we have enabled hybrid post-quantum key agreement. Read our blog for the details.
You are using X25519 which is not post-quantum secure.
Deployed key agreements
Available with TLSv1.3 including HTTP/3 (QUIC)
|Key agreement||TLS identifier|
- Chrome Canary
(restricted to ≤HTTP/2) if you turn on
TLS 1.3 hybridized Kyber support
- Our fork of Go.
[new!]. Upstream only
0x6399; for the others use our old fork.
- Our fork of QUIC-go.
- Goutam Tamvada's fork of Firefox.
- Open Quantum Safe with the right setting. [new!]
- Zig nightly. [new!]
You can reach us directly at firstname.lastname@example.org with questions and feedback.