Final answer:
The topic refers to the ongoing management of security controls in information systems, vital for national security and the balance between state sovereignty and individual rights.
Step-by-step explanation:
The passage discusses the concept of monitoring and updating security controls within an information system, ensuring they are effective and adaptive to changes. This process is crucial as it protects both the system and the data it holds against a wide array of threats, from cyber attacks to physical breaches. The practice of safeguarding a nation's security infrastructure goes beyond the military aspect and includes economic, energy, environmental security, and more. National security measures can cause conflicts between state preservation and individual freedoms if not governed with the rule of law and oversight. As such, the balance between maintaining a state's sovereignty and respecting civil liberties is delicate and must be managed carefully to prevent abuse under the guise of national security.