Government researchers have revealed that they have been working on a cryptographically secure quantum internet for over two years. From
MIT Technology Review:
One of the dreams for security experts is the creation of a quantum
internet that allows perfectly secure communication based on the
powerful laws of quantum mechanics.
The basic idea here is that
the act of measuring a quantum object, such as a photon, always changes
it. So any attempt to eavesdrop on a quantum message cannot fail to
leave telltale signs of snooping that the receiver can detect. That
allows anybody to send a “one-time pad” over a quantum network which can then be used for secure communication using conventional classical communication. . . . .
Today, Richard Hughes and pals at Los Alamos National Labs in New Mexico
reveal an alternative quantum internet, which they say they’ve been
running for two and half years. Their approach is to create a quantum
network based around a hub and spoke-type network. All messages get
routed from any point in the network to another via this central hub. . . .
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