Security headers · Norway companies

What share of Norway companies have no HSTS or Content-Security-Policy header?

72.84%

72.84% of Norway companies (95% CI 69.65–75.81%), measured across 799 companies on 2026-08-13.

strong: 27.16%partial: 31.41%missing: 41.43%
strong · 27.16%partial · 31.41%missing · 41.43%
Trend

Measured every Thursday since 2026-08-01 — 4 observations to date. Last measured 2026-08-13.

How this is measured

Tier 3a; check Strict-Transport-Security, Content-Security-Policy, X-Frame-Options on the homepage response. 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: brreg-norway-per600-seed20260730.

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

Why it matters

HSTS is what stops the first, downgradeable request; CSP is what limits the damage of injected script. Both are one-line changes, and both are commonly switched off silently by a framework upgrade or a proxy change.

The same check, other segments

Show the remaining 65 segments

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