The article discusses the 4C model, which is a security framework designed to protect cloud-native applications running in containerized environments such as Kubernetes. The four layers of this model are Cloud, Cluster, Container, and Code. Each layer builds upon the defenses of the previous one, highlighting how weaknesses in any layer can compromise others. The article provides detailed guidance on securing each layer, emphasizing the importance of a proactive security approach that integrates with development processes. It also mentions popular tools like Snyk, Falco, Orca Security, and Check Point CloudGuard that support the implementation of the 4C model at each of its layers.