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Erasure Fan-Out

Six target classes, four states each, and two cells left empty on purpose.

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Instructed Acknowledged Attested Verified Transactional stores Hard delete Row count returned Signed attestation Key probe absent Immutable logs Destroy subject key Key version gone Ciphertext retained Decrypt fails Analytics & derived Filter + re-derive Rebuild queued Aggregate re-issued Sampled scan clean Programmatic recipients API instruction 202 with job id Callback attested Reconciled export Manual recipients Tracked obligation Owner acknowledges Human attestation Legally retained Refusal recorded Reason to subject Re-reviewed at expiry Erasure Fan-Out — Four States Per Target, Per Class Two cells are deliberately empty. A manual recipient cannot be verified by the platform, and a legal retention has nothing to attest — both are visible gaps rather than hidden ones. v 1.0 · owner Security & Identity Architecture

Decisions

  • The erasure technique is declared per target in the registry, in advance: hard delete, crypto-shredding, filter-and-re-derive, or tombstone-plus-suppression. The technique is evidence, not an implementation detail.
  • Verification is the platform's own act, not the target's claim. A probe that still returns data after an attestation of completion is a finding against that system's owner.
  • A legally retained category produces a recorded refusal with a reason the subject can read, re-reviewed when the statutory period expires — not a silently skipped target.

The empty cells

  • A manual recipient cannot be verified by the platform. That gap is drawn rather than hidden, and it is tracked as an open obligation with an owner and a due date.
  • A legal retention has nothing to attest. Its fourth state is a scheduled re-review, which is the only honest completion available.

Assumptions

  • Roughly 100 targets per erasure: 40 first-party systems, 60 recipients, of which a minority have no programmatic mechanism.
  • Sampling gives ≥ 99% confidence of detecting a target with a ≥ 1% residual-data rate within 7 days.