Artifact Signing

Overview

Artifact Signing is the cryptographic signing of software packages, container images, binaries, manifests, attestations, or other build outputs so recipients can verify origin and detect unauthorized modification. The control exists to reduce the likelihood and impact of compromise by making assets, identities, software, data, exposures, and control responsibilities visible and governable. It is broader than code signing because the signed object may be metadata, a provenance statement, a deployment bundle, or a non-executable release artifact. It should be interpreted alongside Code Signing because the concepts can affect the same decision without representing the same control, event, or risk.

The workflow identifies the protected object and owner, evaluates threats and dependencies, applies preventive and detective safeguards, and routes exceptions or failures to accountable teams. Controls should be tested against realistic misuse, version changes, privileged access, third parties, and recovery conditions. In this context, a mature process protects signing identities, binds signatures to immutable digests, records provenance, verifies at admission or deployment, supports revocation, and prevents untrusted builds from reaching signing infrastructure.

It should connect the term to Key Management where that relationship changes access, transaction treatment, investigation, communication, or recovery.

Records should preserve scope, ownership, configuration or policy version, changes, approvals, test results, alerts, exceptions, incidents, remediation, and verification that the risk was reduced. Evidence must be protected from alteration and retained according to legal and operational need.

Useful measures include coverage, control effectiveness, unresolved critical findings, remediation age, unauthorized changes, detection time, incident frequency, repeat weaknesses, exception volume, and recovery performance.

The relationship with Asset Inventory should be documented where it affects residual risk or control ownership.