Quantum Key Distribution And Unbreakable Communication Networks
Saturday, August 4, 2012 - 10:10
in Physics & Chemistry
An experiment using single particles of light, photons, have produced and implemented them intoa quantum key distribution (QKD) link. The single photons were produced using two devices made of semiconductor nano-structures that emitted a photon each time they were excited by an electrical pulse. The two devices were made up of different semiconductor materials so they emitted photons with different colors. QKD is a process that enables two parties, ‘Alice’ and ‘Bob’, to share a secret key that can then be used to protect data they want to send to each other. The secret key is made up of a stream of photons that ‘spin’ in different directions – vertically, horizontally or diagonally – according to the sender’s preferences. read more