Full security of quantum key distribution from no-signaling constraints
<|reference_start|>Full security of quantum key distribution from no-signaling constraints: We analyze a cryptographic protocol for generating a distributed secret key from correlations that violate a Bell inequality by a sufficient amount, and prove its security against eavesdroppers, constrained only by the assumption that any information accessible to them must be compatible with the non-signaling principle. The claim holds with respect to the state-of-the-art security definition used in cryptography, known as universally-composable security. The non-signaling assumption only refers to the statistics of measurement outcomes depending on the choices of measurements; hence security is independent of the internal workings of the devices --- they do not even need to follow the laws of quantum theory. This is relevant for practice as a correct and complete modeling of realistic devices is generally impossible. The techniques developed are general and can be applied to other Bell inequality-based protocols. In particular, we provide a scheme for estimating Bell-inequality violations when the samples are not independent and identically distributed.<|reference_end|>
@article{masanes2006full,
    title={Full security of quantum key distribution from no-signaling constraints},
    author={Ll. Masanes, R. Renner, M. Christandl, A. Winter, J. Barrett},
    journal={IEEE Transactions on Information Theory, Volume 60, Issue 8, pages
  4973-4986, year 2014},
    year={2006},
    doi={10.1109/TIT.2014.2329417},
    archivePrefix={arXiv},
    eprint={quant-ph/0606049},
    primaryClass={quant-ph cs.CR}
}