Shashwat Kumar

The Signal · Issue 01 · Quantum Computing

India's quantum kilometres, and what counts as one

The National Quantum Mission says it has crossed 1,000 km of quantum-secure communication in about three years. A free-space link test followed. The milestone is real progress; the definition of the metric matters.

By Shashwat Kumar · · 2 min read · Analysis

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Facts are attributed and linked to their sources. The analysis and opinions are the author's own.

What it is

On 30 September, at the PRAGATI Q-Foundry event in New Delhi, Science and Technology Minister Dr Jitendra Singh said India had crossed 1,000 km of quantum-secure communication, surpassing half of its eight-year target in less than three years, and launched nine new startups under the National Quantum Mission. He described an ecosystem of 14 technical groups, 17 project teams, over 150 researchers and 43 institutions across 17 states and two Union Territories.

ETGovernment notes the mission was approved in April 2023 with an outlay of ₹6,003.65 crore for 2023–24 to 2030–31, and that its goals include satellite-based secure quantum communication over 2,000 km. It also observes that the announcement did not specify whether the 1,000 km is a continuous operational network, interconnected experimental links or multiple demonstrations.

Separately, QNu Labs, BISAG-N and IIT Gandhinagar demonstrated India's first free-space quantum key distribution link over 5.56 km on the night of 27–28 September, combining hardware QKD with software post-quantum cryptography, according to a government release reported by ANI.

Why it matters

Quantum-secure communication matters to banks, payment systems and critical infrastructure, because today's encrypted traffic could in principle be recorded now and decrypted later. National capability here is a strategic asset, and the pace of the mission is encouraging.

A milestone is only as useful as its definition. 'Kilometres' can mean a network, a set of links, or a sum of demos.

The ETGovernment point is the one a measurement person should underline. 'Kilometres of quantum-secure communication' can mean several different things, and they imply very different levels of readiness. A good milestone states its definition.

I raise the definition point not to diminish the achievement but because it is how milestones become useful for planning. A regulator or a bank deciding when to pilot quantum-secure links needs to know distance, key-generation rate, availability and cost per link. A single cumulative number is good for momentum and poor for decisions. The best public programmes publish both.

The free-space test is a nice example of honest staging. It is described as a first demonstration, at a modest distance, as a foundation for longer links and satellite systems. That is the right way to talk about early results: what was shown, under what conditions, and what it is a step toward.

There is also a practical message for Indian financial institutions that does not depend on quantum hardware at all: start inventorying where cryptography is used, how long the protected data needs to stay confidential, and how hard it would be to change algorithms. That migration work is long, and it is the part that is fully within an institution's control.

What I'd watch

  • A published definition and breakdown of the 1,000 km: link lengths, nodes, key rates and uptime.
  • Free-space results scaling toward the satellite goal, with key rates reported alongside distance.
  • Whether banks and payment operators are brought into pilots early, since they are among the natural first users.

Sources

  1. India Crosses 1,000-Km Milestone in Quantum Secure Communication: Jitendra Singh. News On AIR, 30 Sep 2026.
  2. India achieves 1000-km quantum communication milestone. ETGovernment, Oct 2026.
  3. India demonstrates first free-space QKD link over 5.56 km. The Hindu BusinessLine (ANI), 3 Oct 2026.