Signing container images: Comparing Sigstore, Notary, and Docker Content Trust
Blog post from Snyk
The article compares three popular container signing solutions: Sigstore Cosign, Notary v2, and Docker Content Trust (DCT). Each tool has its own strengths and weaknesses, and the choice of which one to use depends on specific requirements and priorities. Sigstore Cosign is well-suited for organizations prioritizing secure and transparent software updates, with great community support and features like interoperability between registries. DCT stands out in scenarios where simplicity and seamless integration with Docker are essential. Notary v2 offers a more comprehensive solution for maintaining trust in the software supply chain but requires careful consideration and planning due to its complexity and ongoing development status. The article provides a step-by-step guide on how to sign a Docker image using Cosign, including generating private and public keys, signing the image, and verifying the signature.