{
 "metric": "dnssec",
 "segment": "vn",
 "anchor": "domain",
 "label": "Vietnam (domains)",
 "population": "domains in Vietnam",
 "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": 122,
  "qf_pct": 99.18,
  "ci": [
   95.5,
   99.86
  ],
  "dist": {
   "signed": 0.82,
   "broken_chain": 0.82,
   "unsigned": 98.36
  },
  "snapshot": "common-crawl-domain-stratified-c400-g2500-seed20260729"
 },
 "series": [
  {
   "day": "2026-08-01",
   "n": 61,
   "qf_pct": 98.36,
   "ci": [
    91.28,
    99.71
   ],
   "dist": {
    "signed": 1.64,
    "broken_chain": 4.92,
    "unsigned": 93.44
   },
   "snapshot": "common-crawl-domain-stratified-c150-g2500-seed20260729"
  },
  {
   "day": "2026-08-03",
   "n": 62,
   "qf_pct": 98.39,
   "ci": [
    91.41,
    99.71
   ],
   "dist": {
    "signed": 1.61,
    "broken_chain": 4.84,
    "unsigned": 93.55
   },
   "snapshot": "common-crawl-domain-stratified-c150-g2500-seed20260729"
  },
  {
   "day": "2026-08-04",
   "n": 165,
   "qf_pct": 99.39,
   "ci": [
    96.65,
    99.89
   ],
   "dist": {
    "signed": 0.61,
    "broken_chain": 1.82,
    "unsigned": 97.58
   },
   "snapshot": "common-crawl-domain-stratified-c400-g2500-seed20260729"
  },
  {
   "day": "2026-08-05",
   "n": 164,
   "qf_pct": 99.39,
   "ci": [
    96.63,
    99.89
   ],
   "dist": {
    "signed": 0.61,
    "broken_chain": 1.83,
    "unsigned": 97.56
   },
   "snapshot": "common-crawl-domain-stratified-c400-g2500-seed20260729"
  },
  {
   "day": "2026-08-11",
   "n": 122,
   "qf_pct": 99.18,
   "ci": [
    95.5,
    99.86
   ],
   "dist": {
    "signed": 0.82,
    "broken_chain": 0.82,
    "unsigned": 98.36
   },
   "snapshot": "common-crawl-domain-stratified-c400-g2500-seed20260729"
  }
 ],
 "license": "CC BY 4.0",
 "source": "https://quietfailures.com/datasets/dnssec/vn"
}