cosign

Cosign is a command-line utility and container signing implementation that allows users to sign and verify Docker images. It leverages the principles of Transparency and Secure Supply Chains to provide a way to verify the authenticity, integrity, and provenance of container images.

Some key features and concepts of Cosign include:

1. Image signing: Cosign allows users to sign container images using a public and private key pair. The signed image includes a digital signature that can be verified by others.

2. Verification: By verifying the signature of a signed image, users can ensure that the image has not been tampered with and comes from a trusted source.

3. Image transparency: Cosign is built on top of The Update Framework (TUF), which provides transparency in the form of a signing log. It allows users to track image signing activities, view past signatures, and ensures untrusted or compromised keys cannot be used.

4. Container adoption: Cosign aims to bring secure signing and verification practices to the container ecosystem, making it easier for organizations to adopt containers securely by ensuring the integrity and origin of images.

5. Integration: Cosign can be integrated into existing CI/CD pipelines, registry servers, and deployment workflows, making it suitable for both developers and DevOps teams.

Cosign addresses the need for secure container image distribution and helps establish trust between publishers and consumers in containerized environments.