A
Post-quantum TLS readiness
cra.cz
Ready: quantum-resistant key exchange
Short answer
Yes. As of 2026-11-03, cra.cz negotiates the hybrid post-quantum key exchange X25519MLKEM768 over TLSv1.3 (Quantum Aether grade A).
| Grade | A |
|---|---|
| Key exchange | X25519MLKEM768 |
| Post-quantum | yes |
| TLS | TLSv1.3 |
| Hosting network | BlueTone-AS RADIOKOMUNIKACE a.s. |
| Tranco rank | #5656 |
| Country | 🇨🇿 Czechia: #23/26 (37.5%) |
From our weekly tracker of the top 10,000 sites, scanned on 2026-11-03 · /adoption
Show your readiness on your site
Markdown
[](https://ather-quatum.cloud/?domain=cra.cz)