Researchers create long-distance quantum communication device that theoretically can't be hacked. The device embeds information in a single photon, which is sent across optical fibers up to 155 miles long. Should hackers attempt to intercept and spy on the photon, it will be irreversibly altered.

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Researchers create long-distance quantum communication device that theoretically can't be hacked. The device embeds information in a single photon, which is sent across optical fibers up to 155 miles long. Should hackers attempt to intercept and spy on the photon, it will be irreversibly altered.