The Certified Kubernetes Security Specialist (CKS) exam is the newest addition to the Kubernetes certifications administered by the Cloud Native Computing Foundation (CNCF). CKS focuses on best practices for securing container-based applications and Kubernetes during build, deployment, and runtime. As such, the exam covers topics on securing Linux and Docker environments, as well as popular third party tools (e.g. Trivy, Sysdig, Falco) to monitor and audit events in Kubernetes. As for the exam, it is a two-hour, hands-on exam available for candidates with CKA certifications.
Personally, I was interested in learning more about security to help implement better DevSecOps principles at work. Unlike the CKA exam, which included various cluster administration topics that are mostly handled by managed cloud providers or third-party tools, CKS focused more on practical and relevant exercises to help harden my Kubernetes setup.