Security refers to the protection of a nation's sovereignty, citizens' safety, infrastructure, resources from threats such as terrorism, illegal activities (such as drug trafficking), espionage or invasion. It encompasses both physical security (border control) and non-physical aspects (cybersecurity).
Related terms
National Defense: Refers to the military capabilities and strategies employed by a nation for protection against external adversaries.
Intelligence Agencies: Organizations responsible for gathering information about potential threats through covert operations or surveillance activities.
Cybersecurity: Measures taken by governments to protect computer systems from unauthorized access, data breaches, or cyberattacks.