National Security
Noun · Security & Infosec
Definitions
The protection of a nation's people, institutions, critical infrastructure, and strategic interests against threats including cyber operations, espionage, sabotage, and disruption. In cybersecurity discussions, the term often arises when attacks affect defense, elections, energy, telecom, or other nationally significant systems.
In plain English: Security concerns that affect a country's critical interests and infrastructure.
Example: "The breach moved from a corporate issue to a national security concern once it touched sensitive government communications infrastructure."