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Unconditional security of entanglement-based continuous-variable quantum secret sharing

Kogias, Ioannis; Xiang, Yu; He, Qiongyi; Adesso, Gerardo

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Authors

Ioannis Kogias

Yu Xiang

Qiongyi He



Abstract

The need for secrecy and security is essential in communication. Secret sharing is a conventional protocol to distribute a secret message to a group of parties, who cannot access it individually but need to cooperate in order to decode it. While several variants of this protocol have been investigated, including realizations using quantum systems, the security of quantum secret sharing schemes still remains unproven almost two decades after their original conception. Here we establish an unconditional security proof for entanglement-based continuous-variable quantum secret sharing schemes, in the limit of asymptotic keys and for an arbitrary number of players. We tackle the problem by resorting to the recently developed one-sided device-independent approach to quantum key distribution. We demonstrate theoretically the feasibility of our scheme, which can be implemented by Gaussian states and homodyne measurements, with no need for ideal single-photon sources or quantum memories. Our results contribute to validating quantum secret sharing as a viable primitive for quantum technologies.

Citation

Kogias, I., Xiang, Y., He, Q., & Adesso, G. (2017). Unconditional security of entanglement-based continuous-variable quantum secret sharing. Physical Review A, 95(1), https://doi.org/10.1103/PhysRevA.95.012315

Journal Article Type Article
Acceptance Date Dec 23, 2016
Publication Date Jan 12, 2017
Deposit Date Feb 24, 2017
Publicly Available Date Mar 29, 2024
Journal Physical Review A
Print ISSN 2469-9926
Electronic ISSN 2469-9934
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 95
Issue 1
DOI https://doi.org/10.1103/PhysRevA.95.012315
Public URL https://nottingham-repository.worktribe.com/output/840725
Publisher URL http://journals.aps.org/pra/abstract/10.1103/PhysRevA.95.012315

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