ISRO General News and Updates

[ShouvikGhosh]

 

[Indx TechStyle]

Jan 31, 2022
Department of Space demonstrates entanglement based quantum communication over 300m free space along with real time cryptographic applications

On 27 January 2022, scientists from the two premier laboratories of Department of Space (DOS), viz. Space Applications Centre (SAC) and Physical Research Laboratory (PRL), both from the city of Ahmedabad, have jointly demonstrated quantum entanglement based real time Quantum Key Distribution (QKD) over 300m atmospheric channel along with quantum-secure text, image transmission and quantum-assisted two-way video calling. The demonstration was conducted at SAC, Ahmedabad, between two buildings separated by a distance of 300 m. This experiment and demonstration were repeated over several nights to ensure the repeatability and robustness of indigenously developed QKD system capable of seamlessly generating and utilizing secure keys for various applications.

Shri. S. Somanath, Chairman, ISRO / Secretary, DOS has witnessed this live breakthrough demonstration at SAC, Ahmedabad. Shri. Nilesh M Desai, Director SAC and Dr. Anil Bhardwaj, Director PRL were also present during the demonstration. Various images were encrypted using generated quantum key and transmitted over classical channel from one building to another building separated by 300m and decrypted at the receiving terminal in real time.

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.

In order to achieve this technology feat, scientists developed various key technologies like 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 has also been developed and demonstrated for text, image, video encryption/decryption.

The BBM92 protocol based quantum communication link was demonstrated in the experiment. 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.

With these developments, ISRO, Department of Space is getting ready for satellite based demonstrations of fundamental quantum mechanics experiments as well as quantum communication for future-proof data security.

 

[THESIS THORON]

 

[Akula]

 

[THESIS THORON]

where agnikul tested their engine ?? isro facility ??

 

[Akula]

where agnikul tested their engine ?? isro facility ??

Yes

 

[ShouvikGhosh]

 

[Varoon2]

^
Good news, though overdue. If they have solved the technical issue, then( excuse the layman's reasoning) why not launch this first, since it is the most easy to assemble? Probably something to do with prioritising the PSLV/Risat-1A and Oceansat-3.

 

[Akula]

^
Good news, though overdue. If they have solved the technical issue, then( excuse the layman's reasoning) why not launch this first, since it is the most easy to assemble? Probably something to do with prioritising the PSLV/Risat-1A and Oceansat-3.

Last year during ground test, the rocket motor of SSLV didn't perform well.

 

[fire starter]

 

[Vamsi]

View attachment 135768

What is this ??

 

[mokoman]

What is this ??

maybe a helper robot for space station or space craft ?

 

[THESIS THORON]

View attachment 135768

maybe a helper robot for space station or space craft ?

yes it is that only.

nasa and esa are working on these, they are known as ASTROBEE

 

[Akula]

yes it is that only.

nasa and esa are working on these, they are known as ASTROBEE

Isro working on robotic arm for 4th stage of PSLV rocket.

 

[Varoon2]

Last year during ground test, the rocket motor of SSLV didn't perform well.

Right, I was just wondering, now that they have( seemingly) fixed that anomaly, could they launch the SSLV ahead of the two PSLVs, since SSLV can be very quickly assembled. Or is it a case of prioritisation of the PSLV missions( which themselves were delayed).

 

[Haldilal]

Right, I was just wondering, now that they have( seemingly) fixed that anomaly, could they launch the SSLV ahead of the two PSLVs, since SSLV can be very quickly assembled. Or is it a case of prioritisation of the PSLV missions( which themselves were delayed).

Ya'll Nibbiars The SSLV will be handeld by the NSIL and the PSLV by the Isro nkt a issue of prioritization but internal issues of the SSLV when they are dead they will.

 

[Varoon2]

Ok no more silly questions from me about the SSLV . Let's hope they keep the April launch date, and that subsequent launches will be very frequent. Including that contracted launch for the US company BlackSky.

 

[Haldilal]

Ya'll Nibbiars last year the Chinese launched 48 mission that excluding the private sectors. And all of them successfull. We literally need to Increase the budget or encourage more private sector participations.

 

[Haldilal]

Ok no more silly questions from me about the SSLV . Let's hope they keep the April launch date, and that subsequent launches will be very frequent. Including that contracted launch for the US company BlackSky.

Ya'll Nibbiars now it Cleary a commercial competition. Isro needs to full conceratet on the science and technology and let the private sectors including the PSU take the launches.

We need more number of launches Nd capacity to have get competitive edge.

And not saying the development on new launchers should be abodend but more private sector participantions.

 

[_merlin_]

ISRO seriously needs to get much, much better with its performance. A pathetic launch rate using the COVID excuse when other countries barely slowed down.