BBM-92 protocol

The DRDO Industry Academia–Centre of Excellence (DIA-CoE), IIT Delhi demonstrated quantum communications technologies in New Delhi.

  • Free-space Entanglement distribution was demonstrated using the BBM-92 protocol, a key quantum key distribution (QKD) method, between two tables separated by 20 meters in the lab and 80m in the open space.
  • This experiment demonstrated short-range quantum communication in a free-space setup.
  • In an innovative experiment, Hybrid entanglement has been demonstrated in a free-space environment, achieving a Quantum Bit Error Rate (QBER) of around 6% in the laboratory over a distance of 10m in the lab.
  • Following India’s First Quantum Key Distribution (QKD) demonstration between the cities of Prayagraj and Vindhyachal, separated by 100 km, by DRDO labs and IIT (D) in February 2022, many new initiatives have been taken by DRDO and IIT (D).
  • The bbm92 protocol is a quantum key distribution scheme that allows two parties to securely share cryptographic keys using quantum mechanics.

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