Post-Quantum Confidential Messaging for Government Agency X

Evaluated QKD and Post-Quantum Cryptography (PQC) for securing a 500 km government data-center communication link against current and future quantum threats. Compared security, network reliability, implementation requirements, and cost constraints, and recommended a hybrid ML-KEM-768 and X25519 key-agreement approach aligned with NCSC and NIST guidance. Conducted Python-based simulation under 30% packet loss and documented performance, feasibility, and five-year cost estimates.