SC-20 Secure Name/Address Resolution Service (Authoritative Source)sc-20

Private hosted zones cannot be DNSSEC-signed, which is why the first command narrows to Config.PrivateZone==false before the per-zone loop; asserting SIGNING over every hosted zone would fail on private zones for a reason that is not a finding. Drive the loop from list-hosted-zones rather than from whatever get-dnssec happens to return, so a zone that was never configured is a visible failure instead of an absent row. SC-20's second limb — the means to indicate the security status of child zones and enable verification of a chain of trust — is carried by KeySigningKeys[].DSRecord, which get-dnssec returns and the assertions cover. Whether that DS record has actually been published by the parent is a fact about the registrar, not about the zone: where the domain is registered with Route 53 Domains, get-domain-detail's DnssecKeys evidences it directly, and where it is registered elsewhere the registrar's own DS confirmation is the artifact to attach. No assertion is written against the third command for that reason — it is decisive for some tenants and inapplicable to others, and an assertion that silently does not apply is worse than a named gap. ACTION_NEEDED on either the zone status or a KSK is an outage risk, not a paperwork state; AWS recommends a CloudWatch alarm on DNSSECInternalFailure and DNSSECKeySigningKeysNeedingAction, and a collector that only samples weekly should not be the first thing to notice it. list-hosted-zones returning no public zones passes all three assertions vacuously — a human confirms this account is the authoritative DNS for the offering's names, and confirms registrar-side DS publication where the registrar is not Route 53 Domains. Partial for the second limb of SC-20.