🔬 Science & TechMAINS · GS3.13

Quantum mission crosses 1,000-km secure link

India's flagship quantum-technology programme demonstrates a 1,000-km secure communication link — half its eight-year distance target reached in under three years.

What happened

Under the National Quantum Mission (NQM), India demonstrated a 1,000-km quantum communication network — described as one of the longest such deployments in the world.
The figure is measured against the mission's eight-year target of 2,000 km; in other words, the halfway distance mark was crossed in under three years of launch.
The link runs on indigenous technology built by QNu Labs, an NQM-supported quantum-safe cybersecurity startup, making this one of the longest quantum key distribution (QKD) deployments anywhere.
NQM startup support was widened to a total of 17 ventures (9 newly added) spanning quantum computing, communication, sensing and materials.
The announcement was paired with progress under the broader Research, Development and Innovation (RDI) funding push: the Technology Development Board (TDB) drew 100-plus proposals, and BIRAC fielded nearly 200 biotech applications.
Together these mark a programme moving from sanction to demonstrable hardware — a working long-distance secure channel rather than a lab prototype.

Background & context

The National Quantum Mission is India's umbrella national programme for building a quantum-technology ecosystem. It was approved by the Union Cabinet on 19 April 2023 with a total outlay of ₹6,003.65 crore, running over an eight-year period from 2023-24 to 2030-31. The mission is implemented under the Department of Science and Technology (DST), within the Ministry of Science and Technology, with the Office of the Principal Scientific Adviser also closely associated with its design. As a central-sector scientific mission, it is financed and run by the Union government rather than shared with the States.

The mission is organised around four Thematic Hubs (T-Hubs), each anchored in a cluster of academic and research institutions, and each owning one of the four verticals: quantum computing, quantum communication, quantum sensing and metrology, and quantum materials and devices. The headline scientific targets include developing intermediate-scale quantum computers in the range of 50 to 1,000 physical qubits over the mission period, and building satellite-based and long-distance fibre quantum communication — the strand that today's 1,000-km link advances. The 2,000-km inter-city QKD goal is the communication vertical's flagship distance target.

The 1,000-km milestone sits inside this communication vertical. Quantum key distribution (QKD) is a method of exchanging encryption keys whose security rests on the laws of physics: any attempt to intercept the quantum-encoded photons disturbs them and is detectable, so the parties know if a key has been compromised. It is the practical near-term payoff of quantum communication, and the reason it matters for secure government, banking and defence networks. The work was delivered through QNu Labs, an indigenous quantum-safe cybersecurity company supported under the mission — a deliberate signal that the capability is being grown at home rather than imported.

The release also locates the mission within a wider Research, Development and Innovation (RDI) financing architecture the government is standing up, in which bodies such as the Technology Development Board (TDB) and the Biotechnology Industry Research Assistance Council (BIRAC) channel funds — including newer instruments such as optionally convertible debt (OCD) — into deep-tech and biotech ventures. A parallel national push on research translation and productization (turning lab results into deployable products) frames the day's science announcements, of which the quantum link is the marquee result. The startup cohort named under the mission — Sense-XT, ORVISSEMI, QuBeats, Quantum AI Global, bloq, GDQ Labs, Quantum Biosciences, Bumble Bee Instruments and SAS Qute Electronics among the additions — spreads across all four mission verticals, the deliberate spread that lets the ecosystem mature in computing, communication, sensing and materials at once rather than in a single silo.

It is worth placing the milestone against the global state of play. Long-distance terrestrial QKD has historically been limited by photon loss in optical fibre, which forces the use of trusted relay nodes or, eventually, quantum repeaters to extend reach. A 1,000-km network therefore represents real engineering across the relay-and-loss problem rather than a single point-to-point shot. China built an early multi-thousand-kilometre fibre QKD backbone between major cities and demonstrated satellite-based QKD, which is why the communication vertical of NQM pairs a long-distance fibre target with a satellite-based secure-communication goal. India's figure is presented as among the longest such deployments globally, and the indigenous build means the underlying transmitters, receivers and key-management stack are domestic — the point of the self-reliance design.

For Prelims

Mission: National Quantum Mission (NQM) — India's national programme for quantum technology.
Approved: by the Union Cabinet on 19 April 2023.
Outlay & period: ₹6,003.65 crore over 2023-24 to 2030-31 (eight years).
Nodal body: Department of Science and Technology (DST), Ministry of Science and Technology.
Structure: four Thematic Hubs (T-Hubs) — computing, communication, sensing & metrology, and materials & devices.
Computing target: 50 to 1,000 physical qubits over the mission period.
Communication target: 2,000-km inter-city QKD; satellite-based secure quantum communication.
This milestone: 1,000-km QKD network demonstrated — half the 2,000-km target — using indigenous QNu Labs technology.
QKD: quantum key distribution — physics-based key exchange where any eavesdropping is detectable.
Startup support: widened to 17 ventures (9 newly added) across computing, communication, sensing and materials.
RDI funding bodies named: TDB (100+ proposals) and BIRAC (nearly 200 biotech applications); instrument used includes optionally convertible debt (OCD).
What it is NOT: NQM is a central-sector mission run by DST — not a centrally-sponsored scheme cost-shared with States, and not a defence (DRDO) or space (ISRO) programme, though it serves secure-communication ends. The "1,000 km" is a communication-link distance, not the qubit count; the qubit target is the separate 50-1,000 figure. QKD secures the key exchange — it is not the same as quantum computing breaking encryption.

The full set to keep straight (so "how many / match the pairs" survives): NQM's four verticals each map to one T-Hub — (1) quantum computing → 50-1,000 qubits; (2) quantum communication → 2,000-km QKD and satellite links, the vertical advanced today; (3) quantum sensing & metrology → atomic clocks and precision sensors; (4) quantum materials & devices → the underlying hardware. NQM belongs to the family of recent flagship S&T missions run under DST/PSA — alongside efforts such as the deep-tech and semiconductor pushes — and should not be confused with the Cabinet-cleared semiconductor programme or the supercomputing National Supercomputing Mission, which target different hardware. Its closest international point of comparison is China's long fibre QKD backbone and satellite QKD demonstrations; India's 1,000-km figure is presented as among the longest such deployments globally.

For UPSC: National Quantum Mission — ₹6,003.65 cr, 2023-24 to 2030-31, under DST; four T-Hubs; targets 50-1,000 qubits and 2,000-km QKD. The news: a 1,000-km QKD link (half the target) demonstrated with indigenous QNu Labs technology in under three years.

Why it matters

Secure communication is a strategic vulnerability that classical encryption alone may not survive the arrival of large-scale quantum computers, which could eventually break the public-key cryptography that protects today's banking, government and defence traffic. Quantum key distribution is one credible answer: instead of relying on a hard mathematical problem, it relies on the physics of measurement, so interception is inherently detectable. Demonstrating a 1,000-km link moves QKD out of the laboratory and toward inter-city, network-scale use — the difference between a proof of concept and an asset that can carry real secure traffic between distant nodes.

The mission also addresses a self-reliance gap. The use of indigenous QNu Labs hardware matters because quantum-safe infrastructure built on imported black-box equipment would reintroduce exactly the trust problem the technology is meant to remove. Growing domestic startups — now 17 under the mission — builds the supply chain, the talent base and the standards know-how at home. Reaching half the distance target in under three years is the kind of early, measurable progress that justifies the eight-year, ₹6,003.65-crore commitment and signals that the mission's communication vertical is on or ahead of schedule.

For Mains

Anchor

A direct prompt on India's quantum-technology readiness can be built around the National Quantum Mission — its outlay, four-hub structure, qubit and QKD targets, and this 1,000-km demonstration as evidence of execution.

Data

Use the hard figures — ₹6,003.65 crore, 2023-31, 50-1,000 qubits, a 2,000-km QKD target with 1,000 km already demonstrated, 17 supported startups — to substantiate answers on indigenous deep-tech capability and R&D spending.

Example

The QNu Labs QKD link is a concrete, current example of India translating a national mission into deployable hardware, deployable in answers on indigenisation of critical technology and on science serving security.

Problematisation

The mission implicitly flags the looming "harvest-now, decrypt-later" threat to classical encryption and the dependence on imported cybersecurity hardware — gaps that quantum-safe, home-grown infrastructure is meant to close.

Way forward

Scaling QKD from 1,000 to 2,000 km, adding satellite-based links, and pairing mission funding with the RDI architecture (TDB, BIRAC, instruments like OCD) point to how a deep-tech ecosystem can be financed and matured.

Deploys into: achievements of Indians in science and technology; indigenisation of technology and developing new technology; awareness in the fields of IT, computers and emerging tech; and cyber/communication-network security (GS3.11, GS3.12, GS3.13, GS3.18).

Source

Ministry of Science & Technology · 2026-04-08 · PRID 2250162 · PIB source ↗