India Demonstrates First 5.56-Km Free-Space Quantum-Secure Communication Link
The 5.56 km trial linked BISAG-N and IIT Gandhinagar with secure keys and end-to-end encryption, the ministry said.
- India successfully demonstrated its first free-space Quantum Key Distribution link over 5.56 km on the night of September 27-28, with the Ministry of Electronics and Information Technology announcing the milestone on Saturday.
- QNu Labs partnered with the Bhaskaracharya National Institute for Space Applications and Geo-informatics and IIT Gandhinagar to conduct the trial in a field environment for testing indigenous quantum-secure communication technologies.
- Combining Armos hardware-based QKD with BISAG-N's Vedic Kavach post-quantum cryptography, the system achieved a stable Quantum Bit Error Rate of below 5 per cent and generated keys at 230-260 bits per second.
- Director General Vinay Thakur of BISAG-N said the integration marks a significant step toward practical, quantum-resilient communication systems; Cmde Manish Tripathi Retd of IIT Gandhinagar noted the trial bridges academic research and real-world testing.
- QNu Labs Co-founder and CEO Sunil Gupta emphasized the 5.56 km demonstration enables longer-distance and satellite-based quantum communication networks, positioning India to strengthen its sovereign secure digital infrastructure.
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India, with QNU Labs, BISAG-N, and IIT Gandhinagar, achieved a record quantum key distribution over 5.56 kilometers of free space. This is a major achievement towards the National Quantum Mission.
India demonstrates 5.56 km free-space Quantum Key Distribution link: What it means
In a major breakthrough, India has successfully demonstrated its first free‑space Quantum Key Distribution (QKD) link at a scale of 5.56 km. QNu Labs collaborated with Bhaskaracharya National Institute for Space Applications and Geo‑informatics (BISAG‑N) and IIT Gandhinagar to achieve this remarkable feat during the field test on the night of 27-28 September 2026 between the BISAG and IIT Gandhinagar sites. Using QNu’s Pointing, Acquisition and…
India tests 5.56-km quantum link, ISRO eyes secure communication from space
India has successfully tested a 5.56-km open-air quantum key distribution link between BISAG-N and IIT Gandhinagar. The trial supports ISRO's plans for secure satellite-based quantum communication under the National Quantum Mission.
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India demonstrates first 5.56-km free-space quantum-secure communication link
India has successfully demonstrated its first free-space Quantum Key Distribution (QKD) link over a distance of 5.56 km, marking a step towards building quantum-secure communication networks that could eventually support longer-distance and satellite-based systems.
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