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Blog / 10 Apr 2026

National Quantum Mission: India Builds 1000 km Secure Quantum Network

National Quantum Mission: India Builds 1000 km Secure Quantum Network

Context:

Recently, India’s National Quantum Mission (NQM) has achieved a major milestone by successfully developing a 1,000-kilometre-long secure quantum communication network within just three years of its launch. This achievement places India in a strong global position in the emerging field of quantum technology.

Key Achievement:

NQM demonstrated a 1,000 km quantum communication network much ahead of its planned timeline.

This network is considered among the longest secure quantum communication networks in the world.

It reflects India’s rapidly growing scientific and technological capability.

Significance of the Achievement:

      • Strengthening National Security: This technology ensures highly secure communication for:
        • Defence
        • Intelligence
        • Critical government systems
      • Revolution in Cybersecurity: Quantum communication is more secure than traditional encryption, thereby significantly strengthening digital security infrastructure.
      • Step towards Atmanirbhar Bharat: This achievement reflects India’s:
        • Indigenous technological capability
        • Growing self-reliance in deep-tech sectors
      • Move towards Global Leadership: With this success, India is emerging as a leading country in quantum technology development.

About Quantum Communication Network:

This technology is primarily based on Quantum Key Distribution (QKD).

Quantum Key Distribution (QKD) is a secure communication technique that uses the principles of quantum mechanics to generate a shared secret key between two parties.

      • Working Mechanism:
        • It transmits data using photons (particles of light).
        • According to the no-cloning theorem of quantum physics, an unknown quantum state cannot be perfectly copied.
      • Unbreakable Security:
        • If a hacker tries to intercept or measure the communication, the quantum state of photons changes immediately.
        • This instantly alerts the communicating parties that tampering has occurred, and the key becomes invalid.
      • Importance:
        • Traditional encryption relies on mathematical problems that future quantum computers may break.
        • QKD is based on the laws of physics, making it virtually unbreakable in theory.

About the National Quantum Mission (NQM):

The Government of India approved the mission in April 2023 with a budget of ₹6,003.65 crore, and it is implemented by the Department of Science and Technology (DST).

Four Key Thematic Areas:

      • Quantum Computing: Development of intermediate-scale quantum computers with 50 to 1,000 qubits over 8 years
      • Quantum Communication: Establishment of secure ground and satellite-based communication networks across India
      • Quantum Sensing and Metrology: Development of highly sensitive sensors and atomic clocks
      • Quantum Materials and Devices: Creation of new materials for quantum information processing

Conclusion:

The 1,000 km quantum communication milestone is not just a technological achievement but also a significant step towards Atmanirbhar Bharat. It lays the foundation for a future quantum internet, which will strengthen India’s digital sovereignty and secure communication infrastructure.