Container Image Signing: Securing the Software Supply Chain

Container image signing and runtime verification are essential for securing the software supply chain in containerized environments. By cryptographically signing container images during the build process and verifying them at runtime, organizations can ensure only trusted images are deployed, reducing the risk of supply chain attacks. Image signing involves generating a unique signature using a public key algorithm during continuous integration, which is then verified before deployment to maintain integrity and authenticity. Companies like Google and Datadog use these practices to enhance software supply chain security by establishing cryptographic provenance for container images. Implementing image signing in container runtimes like containerd and CRI-O, or using cloud services like AWS Signer, helps organizations strengthen the security and integrity of their containerized applications. 

https://www.datadoghq.com/blog/container-image-signing

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