zoom_in Click to enlarge

Cosign

▲ ▼

language

description Cosign Overview

Cosign provides a secure method for verifying container images throughout their supply chain. It employs cryptographic signatures on image manifests to ensure integrity and authenticity. This tool is particularly valuable for organizations needing robust security and traceability within their containerized applications. Developers, DevOps teams, and security professionals benefit from Cosign’s ability to validate container origins and prevent tampering.

help Cosign FAQ

What does Cosign sign in a container workflow?

Cosign signs container images and related OCI artifacts, commonly by attaching signatures to image digests in a registry. That lets a deployment system verify an image such as nginx@sha256:... rather than trusting a mutable tag like latest.

How does Cosign relate to Sigstore?

Cosign is part of the Sigstore ecosystem, along with tools such as Fulcio and Rekor. Sigstore is designed to make software signing and verification easier for open-source and cloud-native supply chains.

Can Cosign work without managing private keys?

Yes, Cosign supports keyless signing, where identity is tied to an OIDC provider such as GitHub Actions. Many teams still use key-based signing when they need more traditional key custody.

Why verify Cosign signatures in Kubernetes?

Verification helps ensure the image admitted to a cluster is the same artifact built by a trusted pipeline. Kubernetes teams often combine Cosign with admission controllers such as Kyverno or Sigstore policy-controller.

swap_horiz

Looking for Cosign alternatives? Compare top competitors ranked & scored

arrow_forward