{
 "metric": "security-headers",
 "segment": "cz",
 "anchor": "domain",
 "label": "Czechia (domains)",
 "population": "domains in Czechia",
 "states": [
  "strong",
  "partial",
  "missing"
 ],
 "quiet_failure_states": [
  "partial",
  "missing"
 ],
 "measurement": "Tier 3a; check `Strict-Transport-Security`, `Content-Security-Policy`, `X-Frame-Options` on the homepage response. Denominator: `has_web`.",
 "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.",
 "limits": null,
 "data_tier": "http_3a",
 "population_predicate": "has_web",
 "entity_type": "domain",
 "kind": "failure",
 "latest": {
  "day": "2026-08-13",
  "n": 252,
  "qf_pct": 90.48,
  "ci": [
   86.22,
   93.52
  ],
  "dist": {
   "strong": 9.52,
   "partial": 30.16,
   "missing": 60.32
  },
  "snapshot": "common-crawl-domain-stratified-c400-g2500-seed20260729"
 },
 "series": [
  {
   "day": "2026-08-01",
   "n": 95,
   "qf_pct": 95.79,
   "ci": [
    89.67,
    98.35
   ],
   "dist": {
    "strong": 4.21,
    "partial": 26.32,
    "missing": 69.47
   },
   "snapshot": "common-crawl-domain-stratified-c150-g2500-seed20260729"
  },
  {
   "day": "2026-08-03",
   "n": 99,
   "qf_pct": 93.94,
   "ci": [
    87.4,
    97.19
   ],
   "dist": {
    "strong": 6.06,
    "partial": 24.24,
    "missing": 69.7
   },
   "snapshot": "common-crawl-domain-stratified-c150-g2500-seed20260729"
  },
  {
   "day": "2026-08-04",
   "n": 254,
   "qf_pct": 90.55,
   "ci": [
    86.33,
    93.57
   ],
   "dist": {
    "strong": 9.45,
    "partial": 29.92,
    "missing": 60.63
   },
   "snapshot": "common-crawl-domain-stratified-c400-g2500-seed20260729"
  },
  {
   "day": "2026-08-05",
   "n": 252,
   "qf_pct": 90.48,
   "ci": [
    86.22,
    93.52
   ],
   "dist": {
    "strong": 9.52,
    "partial": 29.76,
    "missing": 60.71
   },
   "snapshot": "common-crawl-domain-stratified-c400-g2500-seed20260729"
  },
  {
   "day": "2026-08-06",
   "n": 253,
   "qf_pct": 90.51,
   "ci": [
    86.27,
    93.54
   ],
   "dist": {
    "strong": 9.49,
    "partial": 30.04,
    "missing": 60.47
   },
   "snapshot": "common-crawl-domain-stratified-c400-g2500-seed20260729"
  },
  {
   "day": "2026-08-13",
   "n": 252,
   "qf_pct": 90.48,
   "ci": [
    86.22,
    93.52
   ],
   "dist": {
    "strong": 9.52,
    "partial": 30.16,
    "missing": 60.32
   },
   "snapshot": "common-crawl-domain-stratified-c400-g2500-seed20260729"
  }
 ],
 "license": "CC BY 4.0",
 "source": "https://quietfailures.com/datasets/security-headers/cz"
}