The Rise of Quantum Internet

A dream of security experts is the creating of a quantum internet which allows secure communication based on the laws of quantum mechanics. The idea is that the act of measuring a quantum object inherently changes it. An attempt to eavesdrop on a quantum message will leave a telltale sign of another snooping that the receiver can detect. This sets ups things for secure messaging known as quantum cryptography. Such a system is already commercially available but it has limitations. The current system generation are point-to-point connections over a single length of fiber  These systems can send secure messages from node A to node B, but they cannot route this information on wards to nodes C, D, E, or F. This is because the act of rerouting the messages means reading the part of the message that states the reroute route, which in turn alters the message.  Los Alamos National Labs have been running a quantum internet capable of sending secure messages for the last two and a half years. The system they have in place involves rerouting a message by sending it through a central hub to various spokes connected to the hub. This allows for secure connection as long as the central hub is secure. Their are however problems associated with the hub and spoke type network, chiefly scalability.  Los Alamos believes it has solved the problem by attaching lasers to receiving nodes allowing for the passing of quantum messages from one spoke to another. This solution however will become obsolete the moment quantum routers become commercially viable. Below is a link to new article from MIT Technology Review.

Yours Truly,

G.Vas

http://www.technologyreview.com/view/514581/government-lab-reveals-quantum-internet-operated-continuously-for-over-two-years/