Practical Relativistic Bit Commitment.

  title={Practical Relativistic Bit Commitment.},
  author={Tommaso Lunghi and J Kaniewski and F{\'e}lix Bussi{\`e}res and Rapha{\"e}l Houlmann and Marco Tomamichel and Stephanie Wehner and Hugo Zbinden},
  journal={Physical review letters},
  volume={115 3},
Bit commitment is a fundamental cryptographic primitive in which Alice wishes to commit a secret bit to Bob. Perfectly secure bit commitment between two mistrustful parties is impossible through an asynchronous exchange of quantum information. Perfect security is, however, possible when Alice and Bob each split into several agents exchanging classical information at times and locations suitably chosen to satisfy specific relativistic constraints. In this Letter we first revisit a previously… CONTINUE READING
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