Quantum communication is a secure method of transmitting data using principles of quantum physics. It uses qubits, which can exist in a superposition of states (0 and 1), allowing them to store more information than classical bits. Quantum cryptography, particularly Quantum Key Distribution (QKD), is used to protect data during transmission. QKD uses photons to exchange keys, and any attempt to intercept the photons would destroy them, making eavesdropping detectable. However, QKD systems are expensive and not yet robust. Current encryption methods rely on algorithms to secure data, but quantum computing could eventually break these methods. India is beginning to develop its quantum infrastructure, with projects like 'Quantum Information Science and Technology (QuST)' and the 'Indian Institute of Science's Centre for Quantum Information and Quantum Computation (CQIQC)'. The Department of Science and Technology (DST) is supporting quantum research, and ISRO is working with Raman Research Institute (RRI) to develop quantum communication technologies for satellites. Collaboration with the University of Waterloo is also underway to establish a Quantum Key Distribution association between India and Canada. Quantum communication and computing are growing fields with potential applications in secure data transmission, factoring large numbers, and understanding quantum mechanics. While practical quantum computers are still a few years away, the goal is to move from observing quantum phenomena to controlling them. Challenges remain in creating stable qubits, protecting quantum machines from interference, and ensuring the reliability of quantum systems. Although quantum computers may not replace conventional computers entirely, they are expected to play a significant role in the future.Quantum communication is a secure method of transmitting data using principles of quantum physics. It uses qubits, which can exist in a superposition of states (0 and 1), allowing them to store more information than classical bits. Quantum cryptography, particularly Quantum Key Distribution (QKD), is used to protect data during transmission. QKD uses photons to exchange keys, and any attempt to intercept the photons would destroy them, making eavesdropping detectable. However, QKD systems are expensive and not yet robust. Current encryption methods rely on algorithms to secure data, but quantum computing could eventually break these methods. India is beginning to develop its quantum infrastructure, with projects like 'Quantum Information Science and Technology (QuST)' and the 'Indian Institute of Science's Centre for Quantum Information and Quantum Computation (CQIQC)'. The Department of Science and Technology (DST) is supporting quantum research, and ISRO is working with Raman Research Institute (RRI) to develop quantum communication technologies for satellites. Collaboration with the University of Waterloo is also underway to establish a Quantum Key Distribution association between India and Canada. Quantum communication and computing are growing fields with potential applications in secure data transmission, factoring large numbers, and understanding quantum mechanics. While practical quantum computers are still a few years away, the goal is to move from observing quantum phenomena to controlling them. Challenges remain in creating stable qubits, protecting quantum machines from interference, and ensuring the reliability of quantum systems. Although quantum computers may not replace conventional computers entirely, they are expected to play a significant role in the future.