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securing-container-registry-images

Secures container registry images (ECR, ACR, GCR, Docker Hub) by scanning with Trivy and Grype, signing with Cosign and Sigstore, configuring registry access controls, and building CI/CD pipelines that block unscanned or unsigned images. Use when establishing registry security controls or enforcing scan/signature checks before image promotion.

skills/securing-container-registry-images/SKILL.md

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# Securing Container Registry Images

## When to Use

- When establishing security controls for container image registries (ECR, ACR, GCR, Docker Hub)
- When building CI/CD pipelines that enforce vulnerability scanning before image promotion
- When implementing image signing and verification to prevent supply chain attacks
- When auditing existing registries for vulnerable, unscanned, or unsigned images
- When compliance requires software bill of materials (SBOM) for deployed container images

**Do not use** for runtime container security (use Falco or Sysdig), for Kubernetes admission control (use OPA Gatekeeper or Kyverno after establishing registry controls), or for host-level vulnerability scanning (use Amazon Inspector or Qualys).

## Prerequisites
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