测量设备无关量子密钥分发中的改进型诱骗态方法

doi:10.3969/j.issn.1671-1122.2024.06.010

摘要/Abstract

摘要：

测量设备无关量子密钥分发协议作为量子网络的候选组件之一，消除了探测端的所有漏洞，提升了系统安全性。目前的测量设备无关量子密钥分发协议采用非理想单光子源，并引入了诱骗态方法来提高密钥率。最近，一种整合在诱骗态方法中的数据后处理方法双扫描法在统计波动方面表现出色。使用诱骗态方法估算单光子对成分时，引入双扫描法能获得更高的密钥率。然而，双扫描法需要耗时的优化过程。在此，文章提出了一种新颖的改进型诱骗态方法，以实现比原始诱骗态方法更好的性能，同时避免了类似双扫描法优化时间的出现。在文章所有的实验参数值模拟中，改进型诱骗态方法均比原始诱骗态方法的密钥率更高；相较于双扫描法，文章所提方法具有速度快、兼容性好的优点。

关键词: 量子密钥分发, 测量设备无关, 诱骗态方法

Abstract:

Measurement-device-independent quantum key distribution (MDI-QKD) is regarded as an efficient and practical building block of quantum networks because it eliminates loopholes on the detection side. Current MDI-QKD protocols implement non-ideal single-photon sources, and the decoy state method has been introduced to improve the key rate. A data processing method for MDI-QKD named the double-scanning method has performed excellently for processing statistical fluctuations. The double-scanning method enables higher key rates when estimating single-photon pair components using the decoy state method. However, this method suffers from requires time-consuming optimization. The article proposed a choosing solution, a novel decoy-state method, to achieve better performance of MDI-QKD than the original decoy-state method while requiring less optimization time than the double-scanning method. In simulations with some experimental parameter values, the article proposed method yielded a higher key rate than the decoy state method. Because no additional scanning optimization is needed, the MDI-QKD protocol with our method is advantageous to its speed and good hardware compatibility.

Key words: quantum key distribution, measurement-device-independent, decoy state method

中图分类号:

TP309

白峻林, 尹华磊. 测量设备无关量子密钥分发中的改进型诱骗态方法[J]. 信息网络安全, 2024, 24(6): 926-936.

BAI Junlin, YIN Hualei. Improved Decoy State Method for Measurement-Device-Independent Quantum Key Distribution[J]. Netinfo Security, 2024, 24(6): 926-936.

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