DRDO Tests Quantum Key Distribution on the Live Network of Its Chandipur Weapons Test Range

India's defence scientists have taken quantum-secured communication out of the laboratory link and into the working network of a live weapons-test range. On 14 October 2026, the Defence Research and Development Organisation (DRDO) said it had successfully configured and tested a Quantum Key Distribution (QKD) platform on the live network of the dynamic test ranges at the Proof & Experimental Establishment (PXE) in Chandipur, Odisha.

The use case is specific and practical: protecting the real-time observations and telemetry generated when artillery and armoured weapon systems are put through their trials. That is data the armed forces, DRDO and industry all depend on, and it is exactly the kind of traffic an adversary would want to intercept.

What DRDO announced

According to DRDO's announcement, reported by ANI, Swarajya and others, the platform was developed under the organisation's Microelectronic Devices, Computational Systems and Cyber Security cluster. Bengaluru-based Taqbit Labs is the production partner. DRDO described the test as a demonstration of "the adept use case" of QKD for securing data on the range network, and said the technology offers unconditional security along with the ability to detect eavesdropping.

DRDO did not publish performance figures for the Chandipur set-up. There was no disclosed key rate, link length, number of nodes or quantum bit error rate, and the reports do not say whether the links ran over optical fibre or free space. What is new is the setting. This was not a point-to-point demonstration between two laboratories but an integration into an operational test-range network that carries live mission data.

Why a test range is a good proving ground

PXE Chandipur is one of DRDO's long-established proof-testing establishments, where guns, ammunition and armoured systems are evaluated before they are inducted. During such trials, sensors, tracking instruments and instrumentation stations stream measurements back to control centres in real time. That data shapes acceptance decisions worth thousands of crores, and it reveals how Indian weapons actually perform.

Using the range as a testbed does two things at once. It secures a sensitive data flow, and it shows that QKD equipment can survive outside a clean laboratory: alongside conventional networking gear, under real operational schedules, and with operators who are not quantum physicists.

How QKD works, in brief

Conventional encryption relies on mathematical problems that are hard for today's computers to solve. A sufficiently powerful quantum computer could break widely used public-key schemes, which is why security agencies worldwide talk about "harvest now, decrypt later" attacks: an adversary records encrypted traffic today and decrypts it years later.

QKD takes a different route. Two parties exchange encryption keys encoded in the quantum states of individual photons. Because measuring a quantum state disturbs it, any attempt to intercept the key introduces detectable errors, and the parties can discard a compromised key before using it. The resulting keys are then used with conventional symmetric encryption to protect the actual data.

Experts commonly add caveats, and some of the coverage of DRDO's test repeated them. QKD by itself does not authenticate who is on the other end of the link, and the security of a complete system still depends on how the hardware is built and how the surrounding devices and networks are protected. QKD is one layer of a secure network, not a replacement for the rest.

Building on July's fibre trials

The Chandipur integration follows DRDO's earlier work with the same partner. In July 2026, DRDO and Taqbit Labs completed military field trials of a scalable, fibre-based QKD system over a 100-kilometre optical-fibre link between Prayagraj and Vindhyachal in Uttar Pradesh. That trial reported a secure key rate of about 5 kilobits per second, enough for secure text and low-bandwidth voice encryption. Swarajya noted that those trials laid the foundation for large-scale, multi-hop quantum networks.

The progression matters. A long-haul fibre demonstration proves the physics and the engineering over distance. Integrating the platform into a live operational network proves it can be useful day to day. Both steps are needed before quantum-secured links can be rolled out across defence installations.

Where this fits in India's quantum push

The test lands in a busy month for Indian quantum communication. In early October, QNu Labs, BISAG-N and IIT Gandhinagar reported a 5.56 km free-space quantum key link, and IIT Delhi demonstrated entangled photons over 50 km of fibre carrying classical telecom data at the same time. The National Quantum Mission, run through thematic hubs at IISc Bengaluru, IIT Madras, IIT Bombay and IIT Delhi, lists secure quantum communication among its core goals.

DRDO's contribution is to show a production partner building hardware for a defence user and installing it on a real network. That pathway from lab prototype, to field trial, to an industry-built system on operational infrastructure is what India's defence-technology policy has been trying to encourage. It also gives a domestic start-up a reference deployment that few competitors can match.

What to watch next

Three questions will decide how quickly this capability spreads:

• Performance disclosure. Key rates, distances and uptime figures from Chandipur would show whether the platform can handle the bandwidth that range telemetry needs.
• Scale. Moving from a single range network to multiple DRDO establishments, and eventually to service networks, will require trusted-node architectures or satellite links, both of which India is pursuing.
• Standards and certification. For QKD to be procured at scale, the armed forces will need evaluation and certification frameworks alongside post-quantum cryptography for links where QKD is impractical.

For now, the Chandipur test is a clear signal: India's quantum-secure communication programme has reached the point where it is protecting real military data, not just laboratory test patterns.

Sources

• DRDO announcement on X: https://x.com/DRDO_India/status/2110235284323602775
• ANI: https://aninews.in/news/national/general-news/drdo-successfully-tests-quantum-key-distributionqkd-platform-in-live-network20261014110557/
• Swarajya: https://swarajyamag.com/defence/india-advances-quantum-secure-defence-communications-as-drdo-successfully-tests-qkd-platform-in-live-network
• Kalinga TV: https://kalingatv.com/nation/drdo-successfully-tests-quantum-key-distributionqkd-platform-in-live-network/
• The NewsMill: https://thenewsmill.com/2026/10/drdo-tests-quantum-key-distribution-platform-in-chandipur-network/
• India Sentinels: https://www.indiasentinels.com/defence-industry/drdo/drdo-tests-quantum-security-on-live-chandipur-network-to-protect-weapons-trial-data-7647
• India TV: https://www.indiatvnews.com/news/india/drdo-successfully-tests-quantum-technology-how-it-could-boost-india-s-data-security-2026-10-14-1056928