Semiquantum key distribution with secure delegated quantum computation.
Semiquantum key distribution with secure delegated quantum computation.
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DOI：
10.1038/srep19898
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发表时间：
2016-01-27
影响因子：
4.6
通讯作者：
Zhang S
中科院分区：
文献类型：
--
作者：
Li Q;Chan WH;Zhang S
半量子密钥分发允许量子方与“经典”方共享随机密钥，后者只能在计算基础上准备和测量量子位，或者在访问量子通道时重新排序一些量子位。在这项工作中，我们提出了一种协议，通过将量子计算安全地委托给量子服务器，可以在量子用户和几乎只需要访问量子通道的量子能力的经典用户之间建立密钥。我们证明，即使委托的量子服务器是一个强大的对手，所提出的协议也是鲁棒的，并且在实验上是可行的。由于协议的一方是量子资源效率最高的一方，它可以更实用，并显着扩大量子密钥分发的适用范围。
Semiquantum key distribution allows a quantum party to share a random key with a “classical” party who only can prepare and measure qubits in the computational basis or reorder some qubits when he has access to a quantum channel. In this work, we present a protocol where a secret key can be established between a quantum user and an almost classical user who only needs the quantum ability to access quantum channels, by securely delegating quantum computation to a quantum server. We show the proposed protocol is robust even when the delegated quantum server is a powerful adversary, and is experimentally feasible with current technology. As one party of our protocol is the most quantum-resource efficient, it can be more practical and significantly widen the applicability scope of quantum key distribution.