Unconditionally secure key distribution in higher dimensions by depolarization

  title={Unconditionally secure key distribution in higher dimensions by depolarization},
  author={Hoi Fung Chau},
  journal={IEEE Transactions on Information Theory},
This paper presents a prepare-and-measure scheme using N-dimensional quantum particles as information carriers where N is a prime power. One of the key ingredients used to resist eavesdropping in this scheme is to depolarize all Pauli errors introduced to the quantum information carriers. Using the Shor-Preskill-type argument, we prove that this scheme is unconditionally secure against all attacks allowed by the laws of quantum physics. For N=2n>2, each information carrier can be replaced by n… CONTINUE READING
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Practical scheme to share a secret key throu g a quantum channel with a 27.5% bit error rate

  • H. F. Chau
  • Phys. Rev. A, vol. 66, pp. 060302(R):1–4, 2002.
  • 2002
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Unconditionally Secure Key Distribution in Higher Dimensions

  • H. F. Chau
  • 2004

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