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Quantum-Safe Satellite Communication protects space-based communications against quantum threats using both quantum key distribution and post-quantum cryptography. Satellites face unique quantum security challenges: long mission lifetimes (15-25 years) extending into the quantum computing era, high-value targets for nation-state adversaries, inability to physically upgrade hardware once launched, free-space optical links enabling QKD over hundreds of kilometers, and critical applications (military communications, GPS, intelligence gathering) requiring maximum security. The solution combines: satellite-to-ground QKD using free-space optical links (avoiding fiber distance limitations), post-quantum cryptography for all satellite command and control, quantum-resistant encryption for payload data, and quantum random number generation for satellite cryptographic operations. China, Europe, and others are deploying quantum satellite networks. QNu Labs develops quantum-safe satellite communication solutions for India's space program and defense applications.
Satellites launched today using classical cryptography will be vulnerable to quantum attacks for most of their operational life. You cannot physically access and upgrade a satellite in orbit - the cryptography must be quantum-safe from launch. Satellite data links are also exposed (broadcast over wide areas) making them attractive targets for harvest-now-decrypt-later attacks. Quantum-safe satellite communication is not optional, it is essential.
Quantum-safe satellites enable secure global communications immune to quantum threats, provide quantum key distribution connectivity to remote regions and maritime operations, extend quantum network coverage globally through space links, and protect critical satellite infrastructure (navigation, reconnaissance, communications) against future quantum attacks. For India, indigenous quantum-safe satellite technology ensures strategic autonomy in space security.
Military satellite communications security, GPS and navigation satellite protection, intelligence gathering satellite secure downlinks, satellite command and control quantum-safe encryption, commercial satellite broadband security, Earth observation satellite data protection, satellite-based quantum key distribution, space-to-ground quantum networks
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