Quantum communication ensures security in communication field by protecting data using principles of quantum physics. Recently, DRDO demonstrated successful quantum communication between 2 of its labs (Defence Research and Development Laboratory and Research Centre, Imarat) using Quantum Key Distribution (QKD) technology. The QKD technology enables the communicating parties to produce a secret key that is random and known only to them. The key is used to encrypt and decrypt messages shared between them. This prevents eavesdropping by third party.