jpwilliams writes "A network leveraging quantum mechanics has been under testing for two years at Los Alamos National Labs.
Because observing a message inevitably changes it, messages based on quantum mechanics are theoretically perfectly secure.
The Los Alamos network works off of a hub and spoke model, where all messages go into a central hub and then out to another end point in the network.
Apparently, some companies are already providing quantum networking, with banks and other security firms interested."
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