Semi-device-independent security of one-way quantum key distribution
Semi-device-independent security of one-way quantum key distribution
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DOI：
10.1103/physreva.84.010302
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发表时间：
2011-07-15
影响因子：
2.9
通讯作者：
Brunner, Nicolas
中科院分区：
文献类型：
--
作者：
Pawlowski, Marcin;Brunner, Nicolas
通过非局域性测试，基于纠缠的量子密钥分发（QKD）的安全性可以增强到“与设备无关”。“在这里，我们问这样一种强大的安全形式是否也可以为单向（准备和测量）QKD建立。虽然完全独立于设备的安全性是不可能的，我们表明，可以保证在一个半设备独立的情况下，对个人攻击的安全性。在后者中，可信方所使用的设备是非特征化的，但协议中使用的量子系统的维数被假设为有界的。我们的安全性证明依赖于单向QKD，维证人和随机访问码之间的类比。
By testing nonlocality, the security of entanglement-based quantum key distribution (QKD) can be enhanced to being "device-independent." Here we ask whether such a strong form of security could also be established for one-way (prepare and measure) QKD. While fully device-independent security is impossible, we show that security can be guaranteed against individual attacks in a semi-device-independent scenario. In the latter, the devices used by the trusted parties are noncharacterized, but the dimensionality of the quantum systems used in the protocol is assumed to be bounded. Our security proof relies on the analogies between one-way QKD, dimension witnesses, and random-access codes.