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Runtime Security

Protecting workloads while they run, watching live process, file, and network behavior on hosts or containers to detect and block malicious activity that bypassed earlier defenses.

Runtime security focuses on what actually happens when workloads run: monitoring system calls, process trees, file changes, and network traffic to spot malicious behavior in real time. Tools at this layer (host EDR, container runtime sensors) catch attacks that bypassed perimeter and build-time defenses, and can also block or contain activity as it happens. As a foundational cloud-security concept, runtime security complements posture management and pipeline guardrails to cover the running stage of the workload lifecycle.

Introduced in: Cloud Security Foundations

Examples

  • An EDR sensor flagging a suspicious process tree on a host.
  • A container runtime tool catching an unauthorized syscall in a pod.
  • Blocking malicious activity in real time on a running workload.
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