Supplier Security Questions
Supplier questions should help move from assertions to evidence-backed assurance. Use them in procurement, supplier assurance, product acceptance, audit, and lifecycle monitoring.
Use this page for wording: what to ask a supplier. Use Supplier and Procurement Assurance for the practice context, and use the Evidence Checklist to turn answers into review criteria.
How to use these questions
Use these questions in two modes:
- Procurement / supplier review: ask broad evidence questions early enough to shape supplier selection, contract terms, renewal, remediation, or continued-use decisions.
- Product acceptance / technical review: ask narrower questions tied to the delivered product, component, firmware, software, service, version, lifecycle state, and verification path.
Identity And Provenance
- What identity evidence can you provide for the supplier, product, device, platform, component, or service?
- Who issued the identity evidence, and what is it bound to?
- What provenance records are available, and how far through the supply chain do they extend?
- What chain-of-custody records exist for logistics, resale, integration, repair, or transfer?
Transparency
- What SBOM, firmware BOM, hardware BOM, or xBOM artifacts are available?
- How are artifacts tied to product versions, firmware versions, builds, or configurations?
- How are artifacts updated after product changes?
- What known limitations or exclusions apply?
Integrity And Attestation
- What evidence shows firmware, software, configuration, or platform state is expected?
- Are reference measurements, signed manifests, measured boot logs, or attestation results available?
- Who verifies the evidence, when, and using what policy or trust anchor?
- How fresh must the evidence be for acceptance or operation?
Updates And Vulnerabilities
- How are updates authorized, signed, delivered, installed, recorded, and rolled back?
- What records show update history for this product or version?
- How are vulnerabilities tracked, remediated, accepted, mitigated, or communicated?
- Can vulnerability status be connected to SBOM/xBOM artifacts and product versions?
Lifecycle State
- What evidence is retained after deployment, update, repair, transfer, revocation, or decommissioning?
- How are credentials revoked, rotated, or re-issued after lifecycle changes?
- What evidence can be reused for audit or customer assurance later?
Request Pattern
Ask for the artifact, owner, lifecycle stage, retention expectation, and verification path. A useful answer should explain not only what the supplier does, but what evidence exists and how a recipient can rely on it.