计算机科学
物理层
光学
光纤
频道(广播)
钥匙(锁)
密钥生成
量子密钥分配
电子工程
电信
无线
物理
计算机网络
工程类
加密
光子
计算机安全
作者
Xinran Huang,Xinyong Peng,Weisheng Hu,Xuelin Yang
出处
期刊:Optics Letters
[The Optical Society]
日期:2024-01-01
卷期号:49 (2): 230-230
摘要
Physical-layer secure key distribution (PLSKD) generally acquires highly correlated entropy sources via bidirectional transmission to share the channel reciprocity. For long-haul fiber links, the non-negligible backscattering noise (BSN) and the challenge of bidirectional optical amplification degrade the key generation performances. Since the channel reciprocity can be precisely mapped using neural networks (NNs), unidirectional PLSKD provides a feasible PLSKD for longer fiber links. Here, a final error-free key generation rate (KGR) in unidirectional PLSKD of 3.07 Gb/s is demonstrated over a 300 km fiber link using NNs. Moreover, the channel mapping is analyzed in terms of fiber distance, chromatic dispersion, the nonlinearity of random source, and BSN.
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