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Breakthrough Leap Of ISRO In The Field Of Quantum Technology

Updated: Jun 26


Breakthrough Leap Of ISRO In The Field Of Quantum Technology
Quantum Mechanics

ISRO's Quantum Technology Revolution: A Leap Forward in Key Distribution


Introduction


On April 14th, 2021, the Indian Space Research Organisation (ISRO) announced a significant breakthrough in the field of quantum communication. ISRO has successfully demonstrated free-space Quantum Key Distribution (QKD) over a distance of 300 meters, making India the fourth country in the world to achieve this feat, after China, the United States, and Japan.


What is Quantum Key Distribution?


  • Quantum Key Distribution is a technology that allows two parties to securely exchange cryptographic keys, which are used to encrypt and decrypt messages. Unlike traditional encryption methods, which rely on mathematical algorithms, QKD uses the principles of quantum mechanics to ensure the security of the keys. The process involves sending single photons of light over a fiber-optic cable or through free-space, and then measuring the properties of those photons to generate a cryptographic key.



ISRO's Free-Space QKD Demonstration


  • ISRO's free-space QKD demonstration involved sending single photons of light from a laser source on the ground to a receiver on a rooftop at a distance of 300 meters. The photons were sent through the Earth's atmosphere, which can cause significant noise and signal loss, making the demonstration even more impressive.


  • The QKD system used by ISRO is based on the BB84 protocol, which was developed by Charles Bennett and Gilles Brassard in 1984. The protocol involves sending two sets of photons, each with one of four polarization states (horizontal, vertical, diagonal, or anti-diagonal). The receiver then measures the polarization of each photon and uses the results to generate a cryptographic key.


Why is Free-Space QKD Important?


  • Free-space QKD has the potential to revolutionize secure communication, particularly in situations where traditional communication methods are not feasible or secure enough. For example, QKD can be used to secure communication between satellites and ground stations, which is becoming increasingly important as the number of satellites in orbit grows.


  • In addition, QKD is resistant to many types of cyber attacks, including those that use quantum computers, which could break traditional encryption methods. As quantum computers become more powerful, QKD is expected to become an even more important tool for secure communication.


Breakthrough Leap Of ISRO In The Field Of Quantum Technology
Quantum Computing

Conclusion | ISRO


ISRO's breakthrough demonstration of free-space Quantum Key Distribution is an exciting development in the field of quantum communication. The successful demonstration of free-space QKD over a distance of 300 meters is a significant achievement and paves the way for further research and development in this field. With the potential to revolutionize secure communication and resist many types of cyber attacks, QKD is likely to become an increasingly important technology in the years to come.


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