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arXiv 1603.03224quant-ph
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基于纠缠的连续变量量子秘密共享的无条件安全性

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

Ioannis Kogias, Yu Xiang, Qiongyi He, Gerardo Adesso

摘要:

保密和安全的需要在通信中是必不可少的。秘密共享是一种传统的协议,它将秘密信息分发给一组参与者,这些参与者不能单独访问它,但需要合作才能解码它。虽然已经研究了这种协议的几种变体,包括使用量子系统的实现,但量子秘密共享方案的安全性在其最初的概念之后近20年仍然没有得到证明。在这里,我们建立了一个无条件的安全性证明连续变量纠缠的量子秘密共享方案,在渐近密钥的限制和任意数量的球员。我们解决这个问题,诉诸最近开发的单边设备无关的方法来量子密钥分发。我们从理论上证明了该方案的可行性,它可以通过高斯态和零差测量来实现,而不需要理想的单光子源或量子存储器。我们的研究结果有助于验证量子秘密共享作为一个可行的原始量子技术。

英文摘要:

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 continuous variable entanglement-based 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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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