Choosing Supply Chain Security Technology Options
Technology choices should start from the assurance decision, not from the acronym. A mechanism is useful when it helps operate a control, produce or protect evidence, exchange that evidence with the right party, or verify that the evidence is still meaningful.
This page helps teams decide which option areas are relevant without turning any single technology into a blanket requirement.
Start with the assurance need
| Assurance need | Useful option areas | Evidence or workflow supported |
|---|---|---|
| Identify a device, product, component, platform, or supplier-provided service | Trust Anchors and Device Identity, Signing, Keys, and Credentials | Device identity, platform identity, certificate chains, key lifecycle records, credential issuance records |
| Show what software, firmware, component, dependency, or vulnerability information is present | SBOM, VEX, and Component Visibility | SBOM/xBOM records, component inventories, vulnerability status records, dependency metadata |
| Compare measured or reported state against expected state | Attestation and Measured State, Evidence Exchange and Verifier Workflows | Measurements, reference values, attestation evidence, verifier appraisal results |
| Protect release, update, recovery, or evidence artifacts from unauthorized change | Signing, Keys, and Credentials, Secure Update and Recovery Mechanisms | Signed releases, update authorization records, recovery artifacts, key-use logs |
| Exchange evidence between suppliers, product teams, operators, assessors, and customers | Evidence Exchange and Verifier Workflows | Evidence requests, attestation exchange, SBOM distribution, verifier policies, APIs |
| Retain evidence for acceptance, audit, renewal, vulnerability response, or incident review | Evidence Repositories, Logs, and Retention | Evidence packages, repository metadata, verifier logs, access records, retention records |
Selection questions
What decision will the option support?
Name the decision first: supplier selection, product acceptance, release approval, update eligibility, vulnerability response, audit readiness, transfer, repair return-to-service, or decommissioning. If the decision is unclear, the technology choice will be hard to justify.
What evidence is needed?
Identify whether the decision needs identity evidence, composition evidence, measured-state evidence, signed artifacts, vulnerability status, lifecycle-state records, verifier results, or retained audit material. Then choose options that support that evidence type.
Who needs to verify it?
Evidence may be verified by an internal product team, procurement team, operator, customer, auditor, assessor, automated verifier, or relying-party service. The recipient affects format, transport, trust anchor, retention, and explanation requirements.
What has to exist around it?
Most options need supporting practices: key governance, supplier obligations, release controls, reference-value management, repository access controls, verifier policies, exception handling, and evidence retention. A mechanism without the surrounding practice is usually weak assurance.
Also distinguish the named option from the concrete implementation. Many options in this section are standards, protocols, architectures, formats, or product categories rather than single products. A TPM, DICE design, SPDM endpoint, SBOM format, TEE, secure element, or verifier workflow still needs an implementation scope, version, supplier, configuration, provisioning model, and evidence path before it can support an assurance decision.
Vendor, product, and tooling examples in these pages are illustrative, not endorsements or complete market surveys. Use them to understand the kind of implementation evidence to request.
What does it not prove?
Record the limits explicitly. An SBOM does not prove components are safe. A signature does not prove content is acceptable. Attestation does not prove provenance without expected-state baselines. A repository does not make evidence trustworthy unless origin, integrity, access, and interpretation are preserved.
If the answer is "we do not know", record that as a limit rather than treating the technology as assurance.
Selection pattern
Use this pattern when choosing or documenting a technology option:
| Step | Question |
|---|---|
| Practice/control need | Which practice or control is this supporting? |
| Evidence need | What record, claim, artifact, measurement, log, or appraisal result is needed? |
| Technology option | Which mechanism, format, protocol, repository, tooling category, or workflow may help? |
| Dependencies | What keys, trust anchors, policies, baselines, repositories, tools, or roles must exist? |
| Verification | Who verifies the evidence, against what policy, and how often? |
| Limits | What would remain unproven or require manual review? |
| Retention | How long must the evidence remain available, explainable, and bound to the product or lifecycle state? |
Supplier and implementer questions
Questions to ask suppliers
- Which technology option are you using, and what assurance decision does it support?
- What evidence does it produce, protect, exchange, verify, or retain?
- What product, component, platform, service, release, or lifecycle state is the evidence bound to?
- What version, profile, implementation scope, or certification claim is relevant?
- What does this option not prove without additional controls or evidence?
Questions to ask internally
- Are we treating this as a requirement, evidence format, implementation option, verifier workflow, repository pattern, or contextual reference?
- What mapping confidence applies: direct, supporting, contextual, adjacent, or gap?
- Who is responsible for verifier policy, exception handling, retention, and refresh?
Questions to ask assessors or auditors
- Is the source, version, mapping rationale, and implementation scope visible enough to review?
- Are advisory mappings clearly labeled as guidance?
- Are endorsement, compliance, and certification claims avoided unless directly supported?