Supply Chain Security with Sigstore and Cosign: Cryptographically Signing Software Artifacts

Guaranteeing Artifact Provenance

Modern DevSecOps requires cryptographic proof that a Docker container running in production was built directly by your authorized CI/CD pipeline and has not been tampered with or replaced by malicious intermediaries.

Signing Images with Cosign

# Sign a container image using OIDC keyless identity
cosign sign --yes ghcr.io/jaydigitalsolutions/app:v1.0.4

# Verify before production deployment
cosign verify --certificate-identity-regexp="^https://github.com/jaydigit"               --certificate-oidc-issuer="https://token.actions.githubusercontent.com"               ghcr.io/jaydigitalsolutions/app:v1.0.4