Researchers from Toshiba Europe have used the cryptography of quantum key distribution (QKD) to send messages with a data record 254 km with a conventional fiber optic cable network. It is the first time that scientists have achieved coherent quantum communication using the existing telecommunications infrastructure.
The breakthrough marks an ultra-proof quantum encryption one step closer, which could ward off hacks even from the most advanced classic and quantum future computers of the future.
QKD is a form of communication that uses the principles of quantum mechanics to safely share encryption keys between two parties. It transmits information in the form of light. These photons carry qubits, the basic units of the quantum information.
It is crucial that it is impossible to “listen” a quantum message without disturbing the quantum states. Both parties would immediately draw attention to listening. This does the technology “not to Apple the. “”
Quantum communication is typically based on expensive lasers and cryogenic cooling devices. However, the researchers were able to send quantum reports via fiber optic cables and possibly bring the technology closer to practical applications in telecommunications.
In the test carried out last year, the team set up a quantum communication network that extends 254 km of existing commercial optical fiber in Germany. The network combined via a relay node in Kirchfeld.
The system managed to send quantum reports twice as far as the data record was defined in previous QKD research without cryogenic cooling. While the data transmission was slow – 110 bit per second – it is still an important springboard. The results were published in Nature this week.
“This work opens the door to practical quantum networks without needing exotic hardware,” said Mirko Pittaluga, one of the main authors of paper, to IEEE Spectrum. “It lowers the entry barrier for the introduction of industry.”
Nowadays, confidential information is transmitted online with encryption keys, the classic computers take an impractically long time to break. However, quantum computers are a different story.
By using quantum phenomena such as overlay and entanglement, quantum computers can process many more options at the same time. If these machines become more powerful, you could possibly hack the safest classic encryption in a few minutes. You could also break the entire internet encryption on what is known as Q-Tag. No wonder that global governments are global governments crawl Development of your own quantum cryptography -infrastructure.
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