 In a spree of publications thereafter, the collaboration between the Norwegian University of Science and Technology in Norway and Max Planck Institute for the Science of Light in Germany, has now demonstrated several methods to successfully eavesdrop on commercial QKD systems based on weaknesses of Avalanche photodiodes (APDs) operating in gated mode.This has sparked research on new approaches to securing communications networks.The task of distributing a secret key could be achieved even when the particle (on which the secret information, e.g.