ISRO successfully demonstrates quantum communication in free space India – News Block

On March 22, ISRO successfully performs a revolutionary demonstration of Quantum Key Distribution (QKD) in free space over 300 meters

Many important and key technologies were developed to achieve the goal, which includes the use of a locally developed NAVIC receiver for time synchronization between the transmitter.

• What is the quantum key distribution?

Quantum key distribution (QKD) is a secure communication method that implements a cryptographic protocol that involves components of quantum mechanics. Allows two parties to produce a shared random secret key known only to them, which can then be used to encrypt and decrypt messages.

This free space QKD was conducted at the Space Application Center (SAC) in Ahmedabad, between two buildings within the 300m ISRO capamus.

It was preformed at night to ensure that there is no interference from sunlight.

It is a satellite-based quantum communication that guarantees the unconditional security of the data. The conventional cryptosystem works with complex mathematical algorithms, while the quantum-based cryptosystem offers security based on the law of physics.

This demo includes live video conferencing using the quantum key encryption system.

Check more on the official ISRO website: https://www.isro.gov.in/update/22-mar-2021/isro-makes-breakthrough-demonstration-of-free-space-quantum-key-distribution- qkd