{
 "metric": "dnssec",
 "segment": "it",
 "anchor": "domain",
 "label": "Italy (domains)",
 "population": "domains in Italy",
 "states": [
  "signed",
  "broken_chain",
  "unsigned"
 ],
 "quiet_failure_states": [
  "broken_chain",
  "unsigned"
 ],
 "measurement": "**local probe** (deliberately, ADR-0009): DNSKEY at the child, then DS at the **parent**. Denominator: `any`.",
 "why_it_matters": "`broken_chain` is the quiet failure and the reason this metric exists — DNSKEY published but no DS at the parent means the zone is signed and *unverifiable*. The operator has done the work, the dashboard says DNSSEC is on, and no resolver on earth validates it. Unsigned is merely the default.",
 "limits": "Must be measured locally. The DomainAPI health endpoint exposes no DNSSEC state and resolves DS at the child, which cannot distinguish `broken_chain` from `signed`.",
 "data_tier": "dns",
 "population_predicate": "any",
 "entity_type": "domain",
 "kind": "failure",
 "latest": {
  "day": "2026-08-11",
  "n": 205,
  "qf_pct": 99.02,
  "ci": [
   96.51,
   99.73
  ],
  "dist": {
   "signed": 0.98,
   "broken_chain": 3.41,
   "unsigned": 95.61
  },
  "snapshot": "common-crawl-domain-stratified-c400-g2500-seed20260729"
 },
 "series": [
  {
   "day": "2026-08-01",
   "n": 95,
   "qf_pct": 97.89,
   "ci": [
    92.65,
    99.42
   ],
   "dist": {
    "signed": 2.11,
    "broken_chain": 2.11,
    "unsigned": 95.79
   },
   "snapshot": "common-crawl-domain-stratified-c150-g2500-seed20260729"
  },
  {
   "day": "2026-08-03",
   "n": 95,
   "qf_pct": 97.89,
   "ci": [
    92.65,
    99.42
   ],
   "dist": {
    "signed": 2.11,
    "broken_chain": 2.11,
    "unsigned": 95.79
   },
   "snapshot": "common-crawl-domain-stratified-c150-g2500-seed20260729"
  },
  {
   "day": "2026-08-04",
   "n": 276,
   "qf_pct": 98.55,
   "ci": [
    96.33,
    99.44
   ],
   "dist": {
    "signed": 1.45,
    "broken_chain": 2.17,
    "unsigned": 96.38
   },
   "snapshot": "common-crawl-domain-stratified-c400-g2500-seed20260729"
  },
  {
   "day": "2026-08-05",
   "n": 275,
   "qf_pct": 98.55,
   "ci": [
    96.32,
    99.43
   ],
   "dist": {
    "signed": 1.45,
    "broken_chain": 2.18,
    "unsigned": 96.36
   },
   "snapshot": "common-crawl-domain-stratified-c400-g2500-seed20260729"
  },
  {
   "day": "2026-08-11",
   "n": 205,
   "qf_pct": 99.02,
   "ci": [
    96.51,
    99.73
   ],
   "dist": {
    "signed": 0.98,
    "broken_chain": 3.41,
    "unsigned": 95.61
   },
   "snapshot": "common-crawl-domain-stratified-c400-g2500-seed20260729"
  }
 ],
 "license": "CC BY 4.0",
 "source": "https://quietfailures.com/datasets/dnssec/it"
}