Safeguard your containers with new container signing capability in GitHub Actions

With the increasing use of containers in cloud-native projects, security risks such as supply chain attacks have become prevalent, prompting the need for robust solutions like container image signing. GitHub, in collaboration with the Open Software Security Foundation (OpenSSF), has integrated support for the sigstore project into GitHub Actions, allowing developers to sign their container images by default, thereby ensuring authenticity and trustworthiness. This process utilizes the cosign tool to sign images with various keys and annotations, enabling verification of the image's origin and integrity. Keyless signing is facilitated through GitHub-provided OIDC tokens, which streamlines the signing process without requiring private key management. This development aims to enhance security for public repositories while protecting private ones, marking a significant step in securing the open-source ecosystem.