# DAT-12 Embedding and vector store integrity

Domain: DAT Data Protection & Privacy · HI-AAF v1.3 · Public review · https://humanintel.net/standard/dat/dat-12

Embedding and vector storage systems support tamper detection or recomputation. Write access is logged and authenticated. Re-indexing procedures are documented and tested.

Embedding and vector storage systems support tamper detection or recomputation to ensure that the content an agent retrieves has not been maliciously modified. Write access is logged and authenticated under IAM-04. Re-indexing procedures are documented and tested, ensuring that the organization can recover from a compromised vector store.

## Maturity

- L1 Ad hoc: Controls exist informally; documentation is incomplete; no consistent review.
- L2 Documented: Controls are written down; ownership is assigned; review cadence is defined.
- L3 Operated: Controls are followed in practice; evidence is collected; deviations are tracked. Published criterion for DAT-12: Tamper detection or recomputation capability is documented; write access is logged; re-indexing procedures have been tested within the documented cadence; unauthorized write attempts are detected and logged.
- L4 Measured: Control effectiveness is measured against documented thresholds; trends are reported.
- L5 Continuously Improved: Controls evolve based on incident learning; maturity gains are evidenced over time.

## Evidence an assessor asks for

- Tamper detection or recomputation capability is documented.
- Write access is logged.
- Re-indexing procedures have been tested within the documented cadence.
- Unauthorized write attempts are detected and logged.

## Framework mappings

- ISO/IEC 42001: A.7.4
- SOC 2 (TSC): CC6.1
- EU AI Act: Art. 10(2)
- Singapore: MAIGF Data, AI Verify Data Governance

Mappings are directional: meeting this control evidences but does not by itself satisfy the external requirement.

## Related

- Cites IAM-04 Action attribution in logs: https://humanintel.net/standard/iam/iam-04

## Cite this control

Human Intelligence. HI-AAF v1.3, DAT-12 Embedding and vector store integrity. Public review edition, July 2026. https://humanintel.net/standard/dat/dat-12