Make the Secure Kubernetes Supply Chain Work for You
summary
Kubernetes adds concrete supply-chain controls since 1.22: projects generate SBOMs (SPDX), produce SLSA provenance attestations outside the build to avoid forged metadata, and apply layered digital signatures during staging and promotion. The release pipeline builds ~50 container images and ~20 binaries, uses an image promoter and a separate file promoter, mirrors artifacts to regional registries, and signs with ephemeral signing via sigstore keyless backed by a transparency log so promoted artifacts remain authentic and auditable.
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