Quantum information has been suggested as a means to prove beyond doubt a person's exact spatial position. But it turns out that all attempts to solve this problem using such an approach are doomed to failure.
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Brassard, G. The conundrum of secure positioning. Nature 479, 307–308 (2011). https://doi.org/10.1038/479307a
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DOI: https://doi.org/10.1038/479307a
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