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Quantum technology demo

Date: 26 February 2022 Tags: Miscellaneous


Researchers from Defence Research and Development Organisation (DRDO) and Indian Institute of Technology (IIT) Delhi demonstrated Quantum Key Distribution (QKD) link for a distance of over 100 kilometres.



The incident marks a crucial development for quantum technology in India. It is however not the first one.



The technology demonstration took place between Prayagraj and Vindhyachal in Uttar Pradesh. A commercial-grade optical fibre was used for demonstration.


Working of Quantum Key Distribution

  • It is a secure communication mechanism that utilizes various components of quantum mechanics.

  • Secret keys are used by both the parties to encrypt and decrypt the message. This ensures that message remains a secret during transmission.

  • The keys are pre-shared securely over Quantum-based communication. This reduces the chances of leakage of keys.



  • The indigenously developed secure key transfer for bootstrapping military-grade communication security key hierarchy has succeeded.

  • Agencies will be able to develop quantum communication network using indigenous technology backbone. The parameters are found to be international standard.


Previous study

The technology was previously tested between two DRDO facilities in Hyderabad. The DRDO Young Scientist Laboratory for Quantum Technologies (DYSL-QT) has worked on this technology.

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