The project was published in Physical Review Letters and funded by the Engineering and Physical Sciences Research Council. The University of Oxford and the University of Edinburgh also took part in the study.
The scientists created a new approach that “bridges the gap between the theoretical promise of perfect security guaranteed by the laws of quantum physics and the practical implementation of such security in large networks”.
Another groundbreaking finding is that this approach is capable of testing the security of quantum devices before they communicate. Instead, they can first look for any correlations between them.
“Our approach works for a general network where you don’t need to trust the manufacturer of the device or network for secrecy to be guaranteed. Our method works by using the network’s structure to limit what an eavesdropper can learn,” said Dr Matty Hoban, from the University of Oxford.
Up until now, there’s been little research exploring communication over quantum networks. And previous findings have focused on what’s possible between two devices.
University College London (UCL) scientists claim to have devised a new method for securing communication between multiple quantum devices.