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arXiv 2212.06148quant-phcs.CR
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打破测量设备无关量子秘密共享的速率-距离限制

Breaking Rate-Distance Limitation of Measurement-Device-Independent Quantum Secret Sharing

Chen-Long Li, Yao Fu, Wen-Bo Liu, Yuan-Mei Xie, Bing-Hong Li, Min-Gang Zhou, Hua-Lei Yin, Zeng-Bing Chen

AI总结:

针对现有量子秘密共享受速率-距离界限制、未考虑参与者攻击等问题,提出基于空间复用的测量设备无关协议,可打破多用户网络速率-距离限制,大幅提升密钥率与传输距离,且在数字签名场景中性能提升显著。

摘要:

当前量子秘密共享领域的大多数进展受限于速率-距离界,因此密钥率受到制约。除了密钥率有限之外,技术难度及相应成本共同阻碍了其大规模部署。此外,大多数现有协议的性能是在渐近情形下分析的,未考虑参与者攻击。本文提出一种密钥率和传输距离均得到提升的测量设备无关量子秘密共享协议。基于空间复用技术,我们的协议表明,在至少包含10个通信方的网络中,它可以打破速率-距离界。与其他协议相比,本工作将秘密密钥率提升了两个数量级以上,且传输距离更远。我们在考虑参与者攻击的可组合框架下分析了协议的安全性,并在有限尺寸情形下评估了其性能。此外,我们探究了将该协议应用于数字签名的场景,其签名速率相比现有协议提升了超过$10^7$倍。我们预计,该量子秘密共享协议将为量子网络上的多方应用提供坚实的发展基础。

英文摘要:

Currently most progresses on quantum secret sharing suffer from rate-distance bound, and thus the key rates are limited. In addition to the limited key rate, the technical difficulty and the corresponding cost together prevent large-scale deployment. Furthermore, the performance of most existing protocols is analyzed in the asymptotic regime without considering participant attacks. Here we report a measurement-device-independent quantum secret sharing protocol with improved key rate and transmission distance. Based on spatial multiplexing, our protocol shows it can break rate-distance bounds over network under at least ten communication parties. Compared with other protocols, our work improves the secret key rate by more than two orders of magnitude and has a longer transmission distance. We analyze the security of our protocol in the composable framework considering participant attacks and evaluate its performance in the finite-size regime. In addition, we investigate applying our protocol to digital signatures where the signature rate is improved more than $10^7$ times compared with existing protocols. We anticipate that our quantum secret sharing protocol will provide a solid future for multiparty applications on the quantum network.

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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