{
  "schema": "varexis-public-evidence-record/0.3",
  "generated_at_utc": "2026-10-16T14:13:51.913Z",
  "record_id": "VXI-EXT-PROCUREMENT-GOOGLE-PSEUDONYM-01-v1",
  "record_kind": "external_reference",
  "title": "Pseudonymization: Reversible tokens and key authority",
  "system": "Google Sensitive Data Protection",
  "evidence_family": "vendor_evidence_review",
  "index_status": "PUBLIC_SAFE_SOURCE_REVIEW",
  "evidence_state": "PRIMARY_DOCUMENTATION_REVIEW_ONLY",
  "canonical_question": "Does tokenizing data with Sensitive Data Protection permanently erase the original meaning?",
  "near_questions": [
    "Which pseudonymization method was used?",
    "Can AES-SIV tokens be re-identified?",
    "Is this HMAC hashing instead?",
    "Who controls the cryptographic key?",
    "What context is needed to reverse tokens?",
    "Are surrogate annotations required for this input?",
    "Do equal inputs produce linked tokens?",
    "Can records be correlated across tables?",
    "Are original copies retained elsewhere?",
    "Which identities can re-identify data?",
    "What disclosure claim is justified?",
    "Can I save the transformation boundary?"
  ],
  "supported_claims": [
    {
      "claim": "AES-SIV and format-preserving encryption support re-identification with the required key and context. HMAC-SHA-256 is a separate one-way option. Deterministic transformations can preserve links between records. Review the selected method and who can re-identify or correlate values; tokenization alone is not proof of erasure.",
      "reliance": "DOCUMENTED_CAPABILITY_ONLY"
    }
  ],
  "not_demonstrated_claims": [
    "Verified buyer configuration or effective access rights",
    "Independent execution, completeness or security testing",
    "Vendor certification, legal compliance or guaranteed suitability"
  ],
  "public_summary": "AES-SIV and format-preserving encryption support re-identification with the required key and context. HMAC-SHA-256 is a separate one-way option. Deterministic transformations can preserve links between records. Review the selected method and who can re-identify or correlate values; tokenization alone is not proof of erasure.",
  "related_record_ids": [],
  "source_review": {
    "source_type": "official_external_documentation",
    "source_title": "Google Sensitive Data Protection: Pseudonymization",
    "source_url": "https://docs.cloud.google.com/sensitive-data-protection/docs/pseudonymization",
    "checked_on": "2026-10-16",
    "candidate_record_id": "VXI-EXT-PROCUREMENT-GOOGLE-PSEUDONYM-01-v1",
    "candidate_record_sha256": "8e56f3748afbac34f36b142fc834a7e63b1990924641b8d36d317edea983a4bb",
    "method": "Primary documentation reviewed for the published bounded statement.",
    "deployment_tested_by_varexis": false,
    "revalidation": "The delivered snapshot preserves the review date shown. Recheck current primary documentation and deployment context before relying on present applicability; payment does not trigger fresh research."
  },
  "answer_policy": {
    "classification": "DOCUMENTED_WITH_DEPLOYMENT_BOUNDARY",
    "bounded_answer": "AES-SIV and format-preserving encryption support re-identification with the required key and context. HMAC-SHA-256 is a separate one-way option. Deterministic transformations can preserve links between records. Review the selected method and who can re-identify or correlate values; tokenization alone is not proof of erasure.",
    "required_buyer_context": "Transformation, structured or unstructured input, key custody, context and recipient authority. Effective configuration and dated operational evidence have not been inspected.",
    "missing_evidence": "A broader claim needs evidence matching the intended use. Payment does not upgrade the evidence state."
  },
  "private_boundary": "Raw logs, thresholds, private paths, source code, protected mechanisms and reconstruction-level details are excluded from public and paid delivery.",
  "decision_profile": {
    "schema": "varexis-vendor-evidence-review/1",
    "review_status": "documentation_review_only",
    "checked_on": "2026-10-16",
    "claim_to_check": "All pseudonymization is irreversible deletion.",
    "documented_statement": {
      "status": "documented",
      "statement": "AES-SIV and format-preserving encryption support re-identification with the required key and context. HMAC-SHA-256 is a separate one-way option. Deterministic transformations can preserve links between records. Review the selected method and who can re-identify or correlate values; tokenization alone is not proof of erasure.",
      "source_ids": [
        "google-dlp"
      ]
    },
    "buyer_evidence_required": [
      "Exact transformation and context configuration.",
      "Key custody and re-identification permissions.",
      "Cross-record linkage and retained original copies."
    ],
    "review_condition": {
      "status": "varexis_review_policy",
      "statement": "Do not describe reversible tokenization as erasure or assume transformed records cannot be linked."
    },
    "unknowns": "The buyer configuration, contract, effective entitlement and operational evidence have not been inspected. Missing evidence does not establish absence or failure of the feature.",
    "evidence_sources": [
      {
        "source_id": "google-dlp",
        "url": "https://docs.cloud.google.com/sensitive-data-protection/docs/pseudonymization",
        "final_url": "https://docs.cloud.google.com/sensitive-data-protection/docs/pseudonymization",
        "title": "Google Sensitive Data Protection: Pseudonymization",
        "checked_on": "2026-10-16",
        "sha256": "b3528dd94f94d0cb7b2eb199e810670941422f9dd902f238c96f30d4be108a54",
        "bytes": 199951
      }
    ],
    "observed_deployment": false,
    "commercial_reliance_boundary": "Procurement evidence support only; no supplier clearance, legal conclusion, configuration audit or verification of the buyer's claim is supplied.",
    "paid_value": {
      "decision_context": "Preserve the reversibility and linkage facts used in a data-sharing review.",
      "free": "Complete review, practical questions, sources and limitations; may be saved locally.",
      "single_request": "Existing server-saved version-bound route snapshot for later authenticated retrieval.",
      "evidence_receipt": "The same snapshot plus the existing unsigned delivery receipt.",
      "excluded": [
        "Fresh vendor research",
        "Continuous monitoring or change alerts",
        "Testing the buyer configuration",
        "Private evidence or vendor certification"
      ],
      "integrity": "Hashes identify content versions; they do not prove truth or provide a signature."
    },
    "revalidation": {
      "trigger": "A saved purchase does not recheck the source or buyer configuration.",
      "specific_watch": "Transformation, structured or unstructured input, key custody, context and recipient authority."
    }
  },
  "paid_access_note": "The full published answer and boundaries are free. Paid access saves the selected route and source versions, with an unsigned receipt when purchased. Preview coverage before paying. Fresh research, bespoke assessment and protected evidence are excluded.",
  "service_route": {
    "request_guide": "/varexis-index/request.html",
    "request_workflow": "/varexis-index/request-workflow.json",
    "service_id": "single_request",
    "service_routes_url": "/varexis-index/service-routes.json",
    "payment_required": true,
    "availability_endpoint": "/api/index/capabilities",
    "operational_status": "AUTOMATIC_SERVICE_CAPABILITIES_GATED",
    "checkout_url": "/index-access"
  },
  "authority_boundary": "VAREXIS-INDEX informs evidence reliance. It does not provide advice, certification, deployment authority, security assurance, production approval, or guarantee.",
  "human_page": "/varexis-index/catalog.html#google-pseudonymization-reversibility-and-key-boundary",
  "machine_readable_record": "/varexis-index/records/google-pseudonymization-reversibility-and-key-boundary.json"
}