India Successfully Tests Unhackable Quantum Communication

Context: DRDO and IIT-Delhi successfully demonstrated quantum communication over 1 km in free space, marking a major step toward secure, hack-proof defence communication in India.

About Quantum Communication

• It is a method of sending information using tiny particles like photons (light particles) in a highly secure
• It uses principles of quantum physics, especially quantum entanglement, to make communication channels leak-proof.
• Any attempt to intercept the communication instantly alters the quantum state, revealing the breach.
• This makes it ideal for use in defence and critical infrastructure.
• The key method used is Quantum Key Distribution (QKD) — a secure way to share encryption keys.
• Quantum entanglement means two particles are connected so that a change in one affects the other, even at a distance.

Applications of Quantum Communication

1. Military and Government: Enables secure, spy-proof communication of highly sensitive data.
2. Banking Sector: Uses QKD to protect online banking and international financial transactions.
3. Power Grids: Secures critical infrastructure from cyber-attacks that could disrupt electricity supply.
4. Consumer Privacy: Enhances protection of personal data during internet usage, including cloud storage and e-commerce.
5. Scientific Collaboration: Ensures safe sharing of research and proprietary data between institutions.
6. Navigation (e.g., GPS): Provides tamper-proof, secure signals, improving reliability and safety of navigation systems.

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