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Quantum Key Distribution(QKD): It is primarily a mechanism to undertake secure communication which utilises a cryptographic protocol involving various components of quantum mechanics.
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Process: The technology enables two communicating sides to come up with random secret keys shared by both of them and known exclusively to them so only they can use it to encrypt and decrypt messages, thus achieving highly-secure communication.
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Why in new? Army has established a Quantum Lab and a Centre for Artificial Intelligence(AI) at Military College of Telecommunication Engineering, Mhow(MP).