Researchers secure 200GB/s data connection with quantum cryptography

via thenomad.info

Toshiba, ADVA Optical Networking and BT have announced a breakthrough in new encryption technology, successfully securing 200GB/s of data over a 100km length of fibre using quantum cryptography.

The system, which encodes encryption keys onto single photons, is able to transmit data five times faster than the previous record for quantum-encrypted data of 40GB/s.

This latest breakthrough is another step on the road to “unhackable” networks as, with this type of quantum encryption, if a person tries to compromise the network and read the data they will change the encoding and alert the system that a breach has been attempted.

The fact that the Toshiba/ADVA/BT consortium uses single photons in its cryptography is part of what has enabled it to smash the bandwidth record.

“Some quantum key distribution (QKD) systems are based on entangled pairs of photons, but here, we’re using just single photons,” Dr Andrew Shields, assistant MD of Toshiba Research Europe, told IT Pro.

“The benefit of using a single photon is we can achieve much higher bitrates and longer distances, although the security of the two techniques is the same,” he explained.

While the technology is still at the research and testing phase, Shields believes unhackable communications networks could be a reality for all in the not-too-distant future.

“We’re coming very close to the time when we will see this working in practice,” said Shields.

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