The Indian Institute of Technology, Delhi and the Defence Research and Development Organisation (DRDO) have demonstrated advanced quantum communication technologies, setting a new standard for secure and tamper-proof communication. These innovations hold immense promise for defence and strategic sectors, emphasizing Quantum Key Distribution (QKD), a cutting-edge encryption method that detects any unauthorized access attemptQuantum technology heralds a future where sensitive data can be transmitted without fear of interception, marking a transformative leap in secure communication for defence, finance, and beyond.
Quantum Communication Milestones
The team successfully showcased QKD over fibre-optic cables, achieving secure communication across 50 km in the lab and 8 km on the IIT Delhi campus. Additionally, free-space quantum communication was tested over short distances, with QKD demonstrated for 20 metres indoors and 80 metres in open-air environments.
Pioneering Free-Space Technology with Indigenous Innovation
The experiments utilized the BBM-92 protocol, a state-of-the-art method that employs photon pairs for ultra-secure information exchange. Another highlight was hybrid entanglement, which achieved an exceptionally low error rate, pointing to its potential for next-generation communication systems.
A key aspect of this initiative was the development of indigenous components, including single-photon sources and high-performance detectors. By reducing dependence on imports, the project strengthens India’s quantum technology ecosystem, reinforcing its position as a leader in secure communication.
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Advancing India’s Quantum Landscape
These achievements build on India’s first QKD demonstration in 2022, which established secure quantum communication over 100 km between Prayagraj and Vindhyachal. With support from defence-focused deep-tech programs, IIT Delhi and DRDO continue to push the boundaries of quantum research.
