F
Post-quantum TLS readiness
cox.net
Critical issue to fix first
Short answer
No. As of 2026-11-03, cox.net does not negotiate post-quantum key exchange; it uses classical key exchange over TLSv1.2 (Quantum Aether grade F), so recorded traffic is exposed to harvest-now-decrypt-later.
| Grade | F |
|---|---|
| Key exchange | — |
| Post-quantum | no (classical) |
| TLS | TLSv1.2 |
| Hosting network | Cox Communications Inc. |
| Tranco rank | #4707 |
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-quantum.com/verify/cox.net)