{
 "metric": "cert-trust",
 "segment": "cz",
 "anchor": "domain",
 "label": "Czechia (domains)",
 "population": "domains in Czechia",
 "states": [
  "ok",
  "hostname_mismatch",
  "self_signed"
 ],
 "quiet_failure_states": [
  "hostname_mismatch",
  "self_signed"
 ],
 "measurement": "Tier 2; compare issuer/subject and check the SAN list covers the host. Denominator: `has_web`.",
 "why_it_matters": "HTTPS is present, the port is open, TLS negotiates — and every visitor gets a browser warning, or would if they checked. Encryption without authentication.",
 "limits": null,
 "data_tier": "tls",
 "population_predicate": "has_web",
 "entity_type": "domain",
 "kind": "failure",
 "latest": {
  "day": "2026-08-12",
  "n": 255,
  "qf_pct": 10.2,
  "ci": [
   7.05,
   14.52
  ],
  "dist": {
   "self_signed": 0.78,
   "hostname_mismatch": 9.41,
   "ok": 89.8
  },
  "snapshot": "common-crawl-domain-stratified-c400-g2500-seed20260729"
 },
 "series": [
  {
   "day": "2026-08-01",
   "n": 98,
   "qf_pct": 14.29,
   "ci": [
    8.7,
    22.56
   ],
   "dist": {
    "ok": 85.71,
    "hostname_mismatch": 14.29,
    "self_signed": 0
   },
   "snapshot": "common-crawl-domain-stratified-c150-g2500-seed20260729"
  },
  {
   "day": "2026-08-03",
   "n": 100,
   "qf_pct": 14,
   "ci": [
    8.53,
    22.14
   ],
   "dist": {
    "self_signed": 0,
    "hostname_mismatch": 14,
    "ok": 86
   },
   "snapshot": "common-crawl-domain-stratified-c150-g2500-seed20260729"
  },
  {
   "day": "2026-08-04",
   "n": 257,
   "qf_pct": 10.89,
   "ci": [
    7.65,
    15.3
   ],
   "dist": {
    "ok": 89.11,
    "hostname_mismatch": 10.12,
    "self_signed": 0.78
   },
   "snapshot": "common-crawl-domain-stratified-c400-g2500-seed20260729"
  },
  {
   "day": "2026-08-05",
   "n": 256,
   "qf_pct": 10.94,
   "ci": [
    7.68,
    15.35
   ],
   "dist": {
    "ok": 89.06,
    "hostname_mismatch": 10.16,
    "self_signed": 0.78
   },
   "snapshot": "common-crawl-domain-stratified-c400-g2500-seed20260729"
  },
  {
   "day": "2026-08-12",
   "n": 255,
   "qf_pct": 10.2,
   "ci": [
    7.05,
    14.52
   ],
   "dist": {
    "self_signed": 0.78,
    "hostname_mismatch": 9.41,
    "ok": 89.8
   },
   "snapshot": "common-crawl-domain-stratified-c400-g2500-seed20260729"
  }
 ],
 "license": "CC BY 4.0",
 "source": "https://quietfailures.com/datasets/cert-trust/cz"
}