India Demonstrates 5.56-Km Free-Space Quantum Key Distribution Link

India has demonstrated its first free-space Quantum Key Distribution (QKD) link over a distance of 5.56 km, establishing a secure quantum communication channel between the Bhaskaracharya National Institute for Space Applications and Geo-informatics (BISAG-N) and the Indian Institute of Technology (IIT) Gandhinagar. The field trial was conducted on the night of September 27–28 by quantum cybersecurity company QNu Labs in collaboration with BISAG-N and IIT Gandhinagar.