Cookie Consent by Free Privacy Policy Generator
Close this search box.

Indian Scientists Demonstrate Wireless Quantum Key Distribution Over 300 Meters

India quantum
India quantum
Indian scientists have demonstrated quantum entanglement-based real time Quantum Key Distribution (QKD) over a 300-meter atmospheric channel. (Credit: ISRO)

Scientists from India’s Department of Space’s (DOS) Space Applications Centre (SAC) and Physical Research Laboratory (PRL), both from the city of Ahmedabad, have demonstrated quantum entanglement-based real time Quantum Key Distribution (QKD) over a 300-meter atmospheric channel along with quantum-secure text, image transmission and quantum-assisted two-way video calling, according to a statement.

The demonstration was conducted at SAC, Ahmedabad, between two buildings separated by a distance of 300 meters. The researchers conducted the experiment and demonstration several times to ensure the repeatability and robustness of the QKD system capable of providing secure keys for various applications.

The team encrypted various images using generated quantum key and transmitted over classical channel from one building to another building and decrypted at the receiving terminal in real time.

According to the statement: “This is yet another significant step towards the development of the planned Satellite Based Quantum Communication (SBQC). This feat comes after the earlier breakthrough demonstration of quantum secure videoconferencing by SAC-ISRO using ‘prepare-and-measure’ quantum communication technology, in free space, over a distance of 300 m on 19 March 2021.”

For the experiment, the scientists developed technologies such as robust & high brightness entangled photon source (EPS), BBM92 protocol implementation, NavIC enabled synchronization, polarization compensation technique etc. A cryptographic application software suite with integrated quantum security was also developed and demonstrated for text, image, video encryption/decryption.

The team also demonstrated the BBM92 protocol-based quantum communication link. The secure-key-rate achieved was ~1.8 kbps, with Quantum Bit Error Rate (QBER) of less than 10%. Quantum entanglement was achieved with Bell’s parameter and quantum visibility greater than 2.2 and 80% respectively.

According to the statement, the experiment paves the way for ISRO, Department of Space to explore satellite-based demonstrations of fundamental quantum mechanics experiments as well as quantum communication for future-proof data security.

Shri. S. Somanath, Chairman, ISRO / Secretary, DOS,  Shri. Nilesh M Desai, Director SAC and Dr. Anil Bhardwaj, Director PRL were present during the demonstration.

The Future of Materials Discovery: Reducing R&D Costs significantly with GenMat’s AI and Machine Learning Tools

When: July 13, 2023 at 11:30am

What: GenMat Webinar

Picture of Jake Vikoren

Jake Vikoren

Company Speaker

Picture of Deep Prasad

Deep Prasad

Company Speaker

Picture of Araceli Venegas

Araceli Venegas

Company Speaker

Matt Swayne

With a several-decades long background in journalism and communications, Matt Swayne has worked as a science communicator for an R1 university for more than 12 years, specializing in translating high tech and deep tech for the general audience. He has served as a writer, editor and analyst at The Quantum Insider since its inception. In addition to his service as a science communicator, Matt also develops courses to improve the media and communications skills of scientists and has taught courses. [email protected]

Share this article:

Keep track of everything going on in the Quantum Technology Market.

In one place.

Join Our Newsletter