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A quantum network connects multiple nodes using quantum key distribution to provide shared quantum-generated encryption keys. Metropolitan quantum networks span a city - connecting government buildings, data centers, financial institutions, hospitals within 50-200 km. National-scale quantum networks connect cities and regions using trusted nodes or satellite links - China's quantum network spans 2,000+ km, Europe is building EuroQCI connecting member states. The applications: secure government communications, financial transaction protection, critical infrastructure control, research network quantum communication experiments. The technology: QKD links between nodes, trusted node architecture for distances beyond single-hop QKD limits, software-defined networking (like QNu Labs' ChaQra) managing key routing and network operations. Future capabilities: quantum computing interconnection, distributed quantum sensing, quantum internet enabling quantum information transmission beyond just keys.
Quantum networks aren't theoretical - they're operational. Beijing-Shanghai 2,000km network protects financial and government traffic. Tokyo's quantum network secures financial districts. Singapore is building quantum-safe infrastructure through IMDA programs. India achieved 500+ km QKD demonstration with QNu Labs technology. These networks provide operational experience and prove quantum security scales beyond lab demonstrations to real-world deployment.
For smart cities, quantum networks enable secure sensor infrastructure and critical control systems. For national security, they provide communications infrastructure resistant to future quantum attacks. For financial hubs, they secure high-value transactions. For telecom operators, quantum networks are next-generation secure communication services. QNu Labs supports metropolitan deployment through Armos QKD, ChaQra networking, and integration with existing fiber infrastructure.
Smart city secure infrastructure and IoT networks, government secure communications metropolitan and national scale, financial sector quantum network linking institutions, critical infrastructure secure control networks, telecom quantum-as-a-service offerings, research and education quantum network testbeds, national quantum communication backbone
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