Secure Software Supply Chains: SBOM to Runtime Enforcement
April 22, 2025 · Ananya Gupta
Modern supply chain threats target build systems, dependencies and artifact provenance. We weave safeguards into standard developer flow— not separate security silos.
Four Pillars
- Visibility: SBOM + dependency graph diffing per PR.
- Integrity: Signed commits & build artifacts (Sigstore / Cosign).
- Policy: Admission control + IaC policy as code.
- Runtime Drift: Continuous image & config scanning.
PR Automation
# Pseudo GitHub Action step
run: sbom-tool generate -o sbom.spdx.json && diff-sbom sbom.base.json sbom.spdx.json
Admission Safeguards
Cluster only admits images with valid attestations (build provenance + vulnerability threshold). Violations create structured alerts with remediation guidance.
Security as a Product
Metrics (time-to-fix critical CVEs, % coverage of signed artifacts) drive incremental improvement rather than fear-driven freezes.