F
Post-quantum TLS readiness
esocial.gov.br
Critical issue to fix first
Short answer
No. As of 2026-11-09, 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 | SERVICO FEDERAL DE PROCESSAMENTO DE DADOS - SERPRO |
| Tranco rank | #8606 |
| Country | 🇧🇷 Brazil: #5/24 (62.6%) |
From our weekly tracker of the top 10,000 sites, scanned on 2026-11-09 · /adoption
Weekly history
| Week | Grade | Key exchange | Post-quantum |
|---|---|---|---|
| 2026-W46 | F | — | no |
| 2026-W45 | F | — | no |
Show your readiness on your site
Markdown
[](https://ather-quantum.com/verify/esocial.gov.br)