Certificate lifetime · France large companies

What share of France large companies have certificates issued for longer than the 47-day maximum?

32.71%

32.71% of France large companies (95% CI 24.55–42.06%), measured across 107 companies on 2026-08-15.

short_lived_ready: 67.29%long_lived: 32.71%
short_lived_ready · 67.29%long_lived · 32.71%
Trend

Measured every Saturday since 2026-08-01 — 3 observations to date. Last measured 2026-08-15.

How this is measured

Tier 1. Validity window of the serving certificate. Denominator: has_web.

Passive measurement: a single DNS lookup, TLS handshake, or homepage GET per domain. Aggregate-only; no individual company is named. 95% Wilson confidence intervals. Population: national company registries (Companies House, Brreg, SIRENE), sampled by size band and resolved to email-active domains. Parked domains excluded. Snapshot: sirene-france-per600-seed20260730.

Licensed CC BY 4.0 — reuse with attribution to Quiet Failures. Download: JSON · CSV.

Why it matters

The CA/Browser Forum is phasing certificate lifetimes down to 47 days. Any domain still on long-lived certificates has a manual renewal process that is about to break several times a year — a deadline-driven quiet failure that has not fired yet.

The same check, other segments

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