Securing Container Images at Runtime

Securing Container Images at Runtime

Runtime image security extends beyond vulnerability scanning to include integrity verification and policy enforcement. Image signing ensures containers run only from trusted sources. Runtime verification confirms images haven't been tampered with since signing. These controls prevent supply chain attacks and unauthorized image modifications.

Content trust implementation requires coordinated efforts across build pipelines and runtime environments. Build processes must sign images after security validation. Runtime environments verify signatures before container creation. Key management becomes critical, requiring secure key storage and rotation procedures. Integration with admission controllers can enforce signature verification cluster-wide.

Runtime image policies control which images can run in specific environments. Policies might restrict images to approved registries, require specific labels, or enforce naming conventions. These policies prevent developers from using untrusted images that could introduce vulnerabilities. Regular policy reviews ensure they remain aligned with security requirements while enabling development productivity.