Quantum Network Eavesdropping Resolved

Researchers are working hard on resolving some problems plaguing quantum computing, in particular, the problem of having someone eavesdrop on the communication known as a side-channel attack.

In a paper, researchers Hoi-Kwong Lo, Marcos Curty, and Bing Qi presented a method that removes all detector side channels, and doubles the secure distance to be covered with conventional lasers.

The problem has been that Alice and Bob's quantum channel conversation can be intercepted by Eve with minimal detection. What the researchers suggest is that the signal be routed through Charlie, who may or may not be under the control of Eve. By comparing the original signal with the signal through Charlie Alice and Bob should be able to detect any form of tampering.

Previously, Qi and Lo disclosed how some Quantum networks may be vulnerable to Trojans.