Unraveling the Pentagon’s quantum problem

US defence organizations are preparing to replace vulnerable cryptography under federal deadlines requiring high-value systems to adopt post-quantum key establishment by December 31, 2030, and digital signatures by 2031. Officials and industry representatives at TechNet Indo-Pacific emphasized identifying affected assets and building architectures that can change cryptographic methods without disrupting missions. The threat includes adversaries collecting encrypted information now for later decryption once sufficiently capable quantum computers become available. Implementation must account for legacy equipment and shortened maintenance windows, with naval officials describing the need to divide major modernization work into smaller, deployable upgrades across multiple locations.