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Qubit-wise teleportation and its application in public-key secret communication

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Abstract

We propose a quantum public-key encryption (QPKE) protocol for an unknown multi-qubit state based on qubit-wise teleportation. The private-key is a computational Boolean function, whereas the public-key is a pair of a random bit string and a quantum state. A private-key corresponds to an exponential number of public-keys. Security analysis showed that the proposed protocol has information-theoretic security from attacks for the private-key and the encryption. A multi-partite quantum secret state sharing protocol is presented based on the proposed multi-qubit-oriented QPKE protocol. Such secret state sharing protocol is information-theoretically secure.

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Acknowledgments

This work was supported by National Natural Science Foundation of China (Grant Nos. 61173157, 61672517).

Author information

Correspondence to Li Yang.

Additional information

An erratum to this article is available at http://dx.doi.org/10.1007/s11432-016-0893-y.

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Wu, C., Yang, L. Qubit-wise teleportation and its application in public-key secret communication. Sci. China Inf. Sci. 60, 032501 (2017). https://doi.org/10.1007/s11432-016-0152-4

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Keywords

  • public-key encryption
  • quantum information
  • quantum teleportation
  • quantum cryptography
  • quantum secret sharing
  • 032501