They found that theres a loophole in how energy-time entanglement-based quantum encryption works that puts QKD devices at risk.
With this security hole, its possible to eavesdrop on traffic without being detected.
While Quantum cryptography technology is commercially available, there is much doubt as to whether it is actually used.
Its mostly rumours, I havent seen any system in use.
But I know that some universities have test networks for secure data transfer, says Prof Larsson.
Two photons are sent out at exactly the same time in different directions.
At both ends of the connection is an interferometer where a small phase shift is added.
This provides the interference that is used to compare similarities in the data from the two stations.
This provides the interference that is used to compare similarities in the data from the two stations.
Consequently they can also read the message without detection.
But this problem can also be solved.
The results of the research have been published inScience Advances.
source: www.techworm.net
