Government agencies and defense contractors handle classified and controlled unclassified information (CUI) that makes them high-value targets for nation-state actors and espionage campaigns. Compliance requirements include FISMA, FedRAMP, CMMC, and NIST 800-53, with strict audit and continuous monitoring mandates. Supply chain attacks, advanced persistent threats (APTs), and zero-day exploits are common attack vectors. Security clearance requirements and air-gapped network environments add unique operational complexity.