New high-speed quantum encryption could frustrate hackers, study finds



Scientists have developed a high-speed encryption system that can protect against common security attacks, even if the computer has faults that could make it vulnerable to leaks.

The system is capable of distributing encryption codes to megabit at -second rates, five to 10 times faster than existing methods and on par with current Internet speeds when running multiple systems in parallel.

In a study published in the journal Science Advances, researchers show that the technique is safe attacks, even in the face of equipment failures that could generate leaks.

"Now it is likely that we have a working quantum computer that could begin to break existing cryptographic codes in the near future," said Daniel Gauthier of Ohio State University in the US. UU

"We really have to think a lot about different techniques that we could use to try to protect the Internet," he said.

To a hacker, ou r Online purchases, banking transactions and medical records look like gibberish due to encryption called encryption keys.

The personal information sent through the web is first encoded using one of these keys, and the receiver decrypts it using the same key. 19659002] For this system to work, both parties must have access to the same key, and it must be kept secret.

The quantum key distribution (QKD) takes advantage of one of the fundamental properties of quantum mechanics: measuring small bits of matter like electrons or photons automatically changes their properties – to exchange keys in a way that immediately alerts both sides of the existence of a security breach.

Although QKD was first theorized in 1984 and implemented shortly thereafter, the technologies to support its width – scale use is only now connecting.

The problem with many of these systems, said Nurul Taimur Islam, of Duke University in the United States, is that they can only transmit codes. • Relatively low rates, between tens and hundreds of kilobits per second, which are too slow for most practical uses on the Internet.

Like many QKD systems, the key transmitter of Islam uses a weakened laser to encode information about individual photons of light. However, they found a way to pack more information into each photon, making their technique faster.

By adjusting the time at which the photon is released, and a property of the photon called phase, your system can encode two bits of information. per photon instead of one.

This trick, along with the high-speed detectors developed by Clinton Cahall of Duke University, drives your system to transmit keys five to 10 times faster than other methods.

"I was changing these additional properties of the photon that allowed us to almost double the security rate we could get if we had not done that," Gauthier said.

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