B
Post-quantum TLS readiness
github.com
Secure today, exposed to harvest-now-decrypt-later
Short answer
No. As of 2026-11-04, github.com does not negotiate post-quantum key exchange; it uses x25519 over TLSv1.3 (Quantum Aether grade B), so recorded traffic is exposed to harvest-now-decrypt-later.
| Grade | B |
|---|---|
| Key exchange | x25519 |
| Post-quantum | no (classical) |
| TLS | TLSv1.3 |
| Hosting network | Microsoft Corporation |
From a live scan on 2026-11-04T15:52:44+00:00
Show your readiness on your site
Markdown
[](https://ather-quatum.cloud/?domain=github.com)