How to secure Kubernetes deployment with signature verification

Securing Kubernetes deployments through signature verification is crucial in ensuring that only trusted container images are deployed within a cluster. This process involves signing container images using tools like Cosign, part of Google's sigstore project, to verify authenticity and integrity. Once signed, images are uploaded to a registry and verified by an admission controller before being deployed. Implementing signature verification helps prevent supply chain attacks by ensuring images remain unchanged from their verified state. The article highlights tools like Cosigned Admission Webhook and Connaisseur for enforcing these security policies within Kubernetes environments, allowing flexibility in deployment strategies and enhancing security layers. Additionally, it covers managing alerts and incidents using Sysdig for better oversight of Kubernetes clusters. By incorporating these practices, organizations can enhance trust and security in their software development lifecycle.