QNu Labs Demonstrates India's First Free-Space Quantum Key Distribution Link

4 Oct 2026, 1:00 pm · 2h ago · 1 min read · OfficeChaiNew

Bengaluru-based deeptech cybersecurity startup QNu Labs has demonstrated India's first free-space Quantum Key Distribution (QKD) link across a distance of 5.56 kilometers. The milestone was achieved in collaboration with the Bhaskaracharya National Institute for Space Applications and Geo-informatics (BISAG-N). Free-space QKD enables secure, tamper-proof communications without relying on physical fiber optics, utilizing quantum mechanics principles to detect potential eavesdropping. This successful demonstration marks a critical step forward for India's national quantum communication capabilities, defense infrastructure, and secure communications ecosystem, proving scalable indigenous technology for sensitive data transmission over line-of-sight terrestrial and satellite-based networks.