- Issuer
- Let's Encrypt
- Max TLS
- TLS1.3
- TLS versions
- TLS 1.3 TLS 1.2 TLS 1.1 TLS 1.0
- Cipher
- ECDHE-RSA-AES128-GCM-SHA256
- Expires
- 1/25/2027 ( 81 d)
- HSTS
- Disabled
- OCSP Stapling
- Disabled
- Last scanned
- 11/4/2026, 12:21:53 PM
Report summary
pr.tn currently holds an SSL grade of A (100/100) from CertH TLS health monitoring. The site supports TLS1.3, TLS1.2, does not enable HSTS, and its certificate is issued by Let's Encrypt — 81 days left on the certificate. CertH records daily TLS handshake probes into an auditable certificate health trend.
Good — Solid security with only minor issues — e.g. no HSTS preload or not fully leveraging TLS 1.3. The mainstream recommended grade.
pr.tn scores higher than 68% of the 12,269 sites we grade.
Percentile is computed over the 12,269 sites CertH has indexed (including ungraded ones), not an industry census.
Full certificate & config details
- Common Name
- proton.me
- Key
- rsaencryption 4096bit
- Sig Hash
- SHA-256
- Chain
- Complete
- SAN
- *.pr.tn · *.proton.me · *.storage.proton.me · pr.tn · proton.me
- Fingerprint
- d5a6c24afcb939467f73b6a08a90d58f4d0e66fc13ca23c32b7ca6b39a63ccc2
What’s working
- TLS 1.3 enabled
- Complete certificate chain
- No legacy TLS or weak ciphers
Score trend
Recent history
| Time | Grade | Score | Issuer |
|---|---|---|---|
| 11/4/2026, 12:21:53 PM | A | 100 | Let's Encrypt |
| 11/4/2026, 7:50:38 AM | A | 95 | Let's Encrypt |
Score change insights · Last 90 days
Net change ↑ +5-
↑
11/4/2026 +5TLS version support improvedAlso observedCAA: — → issue "letsencrypt.org", issue "sectigo.com"
FAQ
When does pr.tn’s certificate expire?
pr.tn’s certificate expires on 1/25/2027, in 81 days, issued by Let's Encrypt.
Is pr.tn’s TLS configuration secure?
pr.tn currently scores A (100/100). It negotiates TLS1.3, TLS1.2 and does not enable HSTS.
Why did pr.tn’s score change?
11/4/2026: +5 points — TLS version support improved