India Completes First 5.56 km Free-Space Quantum Key Distribution Link

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QNu Labs, BISAG-N, and IIT Gandhinagar have completed India's first free-space Quantum Key Distribution link of 5.56 kilometers. This demonstration achieved secure key rates between 230 and 260 bits per second, laying groundwork for future quantum networks and satellite communications.

Key facts

• India's first free-space Quantum Key Distribution link has been demonstrated.
• The link spans 5.56 kilometers.
• The trial achieved secure key rates between 230 and 260 bits per second.
• The demonstration utilized QNu Labs' PAT optical system.
• The system was integrated with BISAG-N's Vedic Kavach platform.