Establishment of end-to-end quantum communication link involving both Fiber and Free space as transport medium

Posted 06 Mar 2024

Updated 27 Mar 2024

2 min read

In a first for India, C-DOT and PRL demonstrated integration of C-DOT’s indigenous Fibre-based Quantum Key Distribution (QKD) system with PRL’s Free Space QKD.
- Centre for Development of Telematics (C-DOT) is telecom Research and Development arm of Department of Telecommunications.
- Physical Research Laboratory (PRL) is a research institute under the Department of Space.

QKD is a technique of quantum communications which enables future-proof security of communication networks using a cryptographic protocol involving components of quantum mechanics.
- It enables two parties to produce a shared random secret key known only to them, which can be used to encrypt and decrypt messages.
- Any intervention or tampering in quantum channel gets detected and key distribution can be aborted.
- QKD can be deployed through different mediums viz. optical fibre, free space as well as satellite to establish secure communication network.

Quantum communications is one of the four verticals of Quantum Technology along with Quantum Computing, Quantum Sensors and Quantum Materials.
- Quantum technology is based on principles of Quantum mechanics such as superimposition, entanglement, tunnelling etc.
- Its applications are in secure communication, computing, simulation, chemistry, healthcare, cryptography, imaging among others.

National Mission on Quantum Technologies and Applications (NM-QTA).
Quantum-Enabled Science and Technology (QuEST).
Quantum Frontier mission of Prime Minister Science, Technology & Innovation Advisory Council (PM-STIAC).
National Mission on Interdisciplinary Cyber-Physical Systems (NM-ICPS).

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