Quantum-Risk Posture and Space Infrastructure: Post-Quantum Cryptography, Homeland Security, and Critical Infrastructure Resilience
Dorothy Gail Rey
This paper explores the transition from theoretical quantum-risk planning to the practical implementation of post-quantum cryptography in the homeland security sector. It focuses on space infrastructure, critical infrastructure protection, and national resilience, assessing threats posed by the "harvest now, decrypt later" approach, post-quantum cryptographic standards, and vulnerabilities in positioning, navigation, and timing systems. The analysis also addresses governance challenges, procurement requirements, and satellite security, proposing resilience-oriented strategies for the protection of national infrastructure. Key recommendations include adopting hybrid cryptographic solutions, automating the detection of vulnerable systems, continuous attestation, cryptographic agility in orbit, and establishing a Space-Quantum Reserve to bolster long-term resilience against quantum threats.
•Jul 3, 2026•0 citations