F
Post-quantum TLS readiness
esocial.gov.br
Critical issue to fix first
Short answer
No. As of 2026-11-03, esocial.gov.br 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 | SERPRO |
| Tranco rank | #8606 |
| Country | 🇧🇷 Brazil: #7/26 (61.4%) |
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=esocial.gov.br)