Quantum computing is often framed as a distant breakthrough: powerful, transformative — and perpetually just over the horizon. That’s misleading. Quantum is already shaping security, communications, and infrastructure. By harnessing quantum mechanics to solve complex problems faster than classical computers, this new technology threatens to break widely used encryption — while simultaneously offering the possibility of securing communication. The US, China, and Europe are engaged in a competitive race. China leads in quantum communication infrastructure, while the US holds an edge in gate-based hardware, which break algorithms into discrete, manageable steps to manipulate data. Europe is strong in quantum research and has spawned startups. All could still win the quantum prize. Unlike classical encryption, quantum key distribution (QKD) leverages the laws of physics to detect any interception attempt, making it tamper-proof rather than merely computationally hard to break. China has already operated a 2,000-kilometer QKD backbone between Beijing and Shanghai and has demonstrated satellite-based quantum key distribution over intercontinental distances. The European Quantum Communication Infrastructure promises to be a secure, pan-European quantum communications network. It will protect government communications, critical infrastructure, and data flows. The US supports quantum networking research through the Department of Energy’s national laboratories, university-led testbeds, and defense-relevant networking experiments. On both sides of the Atlantic, quantum secure communications represent a giant opportunity. Yet quantum also represents a potential danger. Once sufficiently powerful quantum computers exist, many current public-key encryption schemes could be broken. Adversaries such as China are already harvesting encrypted data, with the intent of decrypting it later. The US government has made quantum-safe encryption a legal and strategic requirement. Federal agencies are mandated to identify vulnerable systems and transition to quantum-resistant encryption standards, with a government-wide compliance deadline of 2035. The March 2026 National Cyber Strategy elevated quantum-safe encryption to a core pillar of