DRDO Successfully Tests Quantum Key Distribution Platform for Secure Defence Communications

The Defence Research and Development Organisation (DRDO) has successfully integrated and demonstrated the Quantum Key Distribution (QKD) system on the operational network of dynamic test ranges at the Proof and Experimental Establishment (PXE), Chandipur, Odisha. This development is a milestone towards quantum-secure communications for defence testing, especially for sharing vital telemetry data during the trials of artillery and armoured weapons. This system has been developed by the Microelectronics Devices, Computational Systems, and Cyber Security (MCC) cluster of DRDO in collaboration with their industry partner Taqbit Labs.

Quantum Key Distribution: What Is It?

Quantum Key Distribution is a process in cryptography that uses the fundamentals of quantum mechanics to create and distribute encryption keys to communicating users. These keys may then be applied with the help of an encryption system to secure sensitive information.

In contrast to classical ways of distributing keys based on mathematics, QKD applies quantum states to help reveal attempts to interfere with key transmission, since measuring quantum states interferes with them and reveals any possible attempts at interception.

QKD does not encrypt messages but offers an approach for securing cryptographic keys that will be later used to protect communications.

Major Characteristics of DRDO’s QKD System

The system was configured and tested in the live network of dynamic test ranges at PXE, Chandipur. As per DRDO, this test showcased the practical application of QKD to secure the real-time observations and telemetry associated with the testing of artillery and armoured weapons.

It comprises the following key features,

• Eavesdropping detection: The quantum property can aid in the detection of eavesdropping while key distribution is done.
• Telemetry: Helps in the protection of confidential data being transmitted in connection with the weapon tests.
• Applications for defence: The system has been designed to meet the needs of the security of communication for critical testing infrastructure.
• Made in India: It has been developed by DRDO’s MCC cluster in collaboration with Taqbit Labs.

QKD vs. Quantum-Resistant Cryptography

Both QKD and post-quantum cryptography play roles in to ensuring the security of the communications from quantum-computer attacks in the future; however, they differ in their mechanisms.

Feature	QKD	PQC
Basic principle	Based on the quantum-mechanical principles	Based on mathematical algorithms that resist quantum attacks
Purpose	Secure cryptographic key distribution	Secure key establishment, digital signatures, and other cryptographic applications
Interference detection	Able to detect interference while performing quantum key distribution	Not able to detect interception caused by the disturbance of the quantum state
Infrastructure	Necessitates dedicated quantum communication equipment and a suitable communication channel	Does not necessitate any special infrastructure for deployment
Main concern	Cost of deployment, distance, equipment, and communication channel considerations	Security of the algorithm, implementation, and possible future advances in cryptanalysis

Post-quantum cryptography can also be referred to as quantum-resistant cryptography. Post-quantum cryptography attempts to safeguard digital communications with algorithms resistant to attacks performed by a sufficiently powerful quantum computer.

The two can be considered complementary approaches depending on security needs and existing infrastructure.

What is Free-Space Quantum Key Distribution?

In contrast to conventional QKD using dedicated optical fibres, free-space QKD uses free space to transmit quantum information. Depending on the particular system implementation, this may involve optical links from appropriate transmitter-receiver equipment.

Possible benefits are that no fibre-optic cables have to be laid along some paths at all, which can be costly or hard to do in adverse conditions. However, there are limitations for free-space technology in terms of weather, atmosphere, line-of-sight requirements, distance, and optics.

Why is the QKD Test by the DRDO Significant?

1. Critical Defence Data Protection

There will be sensitive technical data generated in artillery and armour weapon trials.

2. Quantum-secure communication

There have been many uses of quantum communication in defence, financial services, and telecommunications as it is one of the strategic technologies of today and in the future.

3. Development of Domestic Defence Technology

This platform was developed within the DRDO’s MCC cluster, where Taqbit Labs are the manufacturing partners.

4. Future Cryptographic Challenges

Advancements in quantum computing might affect many public-key cryptographic algorithms. There are different methods of resolving such issues – quantum key distribution and post-quantum cryptography.