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Though this experiment marks an end to hidden variables, Dr Hanson says it is also a beginning: that of unassailably secure, quantum-enabled cryptography. It was shown in 1991 that the very Bell tests used to probe hidden variables could also serve as a check on quantum cryptography. A loophole-free Bell test, then, could unfailingly reveal if a hacker had interfered with the fundamentally random, quantum business of generating a cryptographic key. So-called device-independent quantum ciphers would, Dr Hanson says, be secure from hackers "even if you don't trust your own equipment—even if it's been given to you by the NSA". —

The (further) verification that spooky physics has important implications for cryptography.

From http://www.economist.com/news/science-and-technology/21676733-one-weirdest-bits-physics-proved-beyond-doubt-almost-hidden-no-more

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