India’s First 500 km Quantum-Safe Network

Recently, a Bengaluru-based startup, QNu Labs Pvt. Ltd., supported under the National Quantum Mission (NQM) of the Department of Science and Technology (DST), has successfully demonstrated India’s first large-scale Quantum Key Distribution (QKD) network spanning over 500 km.

  • The quantum-secure network was deployed over existing optical fibre infrastructure, marking a major milestone for India’s cybersecurity and quantum communication ecosystem.
  • The Indian Army’s Southern Command played a key role by planning a test-bed fibre network in the Rajasthan Sector, enabling selective access to multiple nodes — including trusted relay nodes — to achieve end-to-end quantum key exchange across the 500+ km link.
  • The achievement ....
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