India’s National Quantum Mission achieves 1,000-km breakthrough in secure communication

In a remarkable stride for secure digital communications , India’s National Quantum Mission has successfully demonstrated a 1,000-kilometre quantum communication network, achieving the milestone in less than two years since the mission’s inception. Officials from the Department of Science and Technology (DST) on Wednesday hailed the development as a “ landmark advancement ” in the field of secure communication.

Unlike traditional networks that transmit information as classical binary signals of 0s and 1s, quantum communication relies on the principles of quantum mechanics , making the transmission inherently secure against eavesdropping . This breakthrough positions India among the global leaders in quantum key distribution (QKD), with the network being one of the longest of its kind worldwide.

“This is a significant leap towards our goal of a 2,000-km quantum communication network over eight years,” said Abhay Karandikar , DST Secretary. “The speed at which we’ve reached the 1,000-km mark underscores the potential of indigenous innovation in critical technologies.”

The network was developed using homegrown solutions by QNu Labs , a startup backed under the mission and specializing in quantum-safe cybersecurity. The technology is designed to operate in challenging environments, including underwater and underground networks, expanding its applications beyond conventional communication systems.

Experts say this advancement is expected to bolster secure communication across defence networks , financial systems , and other critical infrastructure , while furthering India’s ambition of a robust, secure digital ecosystem. “With indigenous technology leading the way, the possibilities for civilian and strategic applications are immense,” added a DST official.

Since its launch in October 2024 , the National Quantum Mission has been steadily pushing the boundaries of quantum science in India. The 1,000-km milestone marks a rapid acceleration of the mission’s objectives, signaling a new era in the country’s digital security landscape.