Home / The Raman Research Institute in Bengaluru has reported a turning point in attempting to secure quantum communication via satellites

The Raman Research Institute in Bengaluru has reported a turning point in attempting to secure quantum communication via satellites
In March of this year, a group of investigators from the Raman Research Institute's (RRI) Quantum Information and Computing Lab in Bengaluru achieved victory in their efforts in using satellites for reliable quantum computation in partnership with ISRO's UR Rao Satellite Centre.

by Shiksha Patel / 03 Apr 2023 18:24 PM IST / 0 Comment(s) / 143

Image Courtesy : www.facebook.com/RRI.Bangalore/



Using Quantum Key Distribution, the attempting to point, Acquisition point, and Tracking system was applied to demonstrate secure data transmission between a stationary device or a moving receiving antenna to point Acquisition, and GPS was used to show cryptographically security between the stationary device and a moving receiver to point, Collection, and Tracking system was used to demonstrate cryptographically secure between a stationary device and even a moving receiver to point, Acquisition, and Trackers was used to showing secure. While the Raman Research Organization evidenced the transmission of quantum locks between three separate stationary points in 2021, India achieved this feat for the first time.



Dr. Urbasi Sinha, team head, explained the significance of this development by mentioning that it had countless security applications, including those related to elections, online banking, and electoral systems. She claims that automated systems are protected by classical cryptography, which is based on the computation cost of the sent encryption keys and could be broken by future quantum computers. The distribution of keys via quantum cryptography, on the other hand, would be the antidote to this. The use of satellites in this mode of communication would also avoid the limitations imposed by the Earth's curvature.



While Chinese teams have demonstrated the ability to communicate from a satellite to ground stations using qubits (quantum entangled particles retain similar properties even when separated by large distances), RRI hopes to demonstrate "uplink," or ground-to-satellite capability in the future. Dr. Sinha believes that this would give much greater flexibility because the photon source might be situated on the ground rather than inside a satellite.



Researchers also noted that its themes precision necessary in these operations was a challenge, as the reliability must be far greater than that required in radio transmissions. The wheeled moving returner platform was built by RRI's mechatronics workshop.



Dr. Sinha explained the experiment in a statement, saying, "First, we developed x-y real-time monitoring without the use of sophisticated gimbal mechanisms." We later used the gimbal methodology to fine-tune the tracking in multiple freedoms of movement. We switched from a comfortable linear track to a comfortable fort circular track to simulate satellite motion. Finally, an entire moving pickup truck with attendant optics, optomechanics, and electronics was built and closely aligned to the receiver module, all working in tandem with both the high-end time synchronization solutions that were also developed."



Interestingly, the sender platform was dubbed 'Alice,' and the receiver platform was dubbed 'Bob,' in a nod to two characters who have been used in research papers and discussions for decades as instances in which individuals communicate with each other.


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