Group key agreement over free-space optical links
Group key agreement over free-space optical links
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DOI：
10.1364/osac.389853
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发表时间：
2020-09
期刊：
影响因子：
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通讯作者：
H. Endo;M. Fujiwara;M. Kitamura;O. Tsuzuki;R. Shimizu;M. Takeoka;M. Sasaki
中科院分区：
文献类型：
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作者：
H. Endo;M. Fujiwara;M. Kitamura;O. Tsuzuki;R. Shimizu;M. Takeoka;M. Sasaki
由于激光束的高方向性和视线配置，自由空间光通信（FSO）可以提供安全的连接。这些安全优势被用来实现两个远程方之间的高速密钥建立，这是可证明的安全对窃听者与无限的计算资源。此外，良好维持的激光束发散允许多方之间的组密钥协商（GKA）。本文提出了一种新的基于FSO链路的GKA方法-FSO-GKA。在数值表征的基本行为，我们提出了一个验证的概念演示FSO-GKA使用7.8公里的地面链路。我们实现了一个组密钥速率约为8 Mbps的58 dB的损失信道的基础上10 MHz的开关键控。研究了几种大气条件下的信息泄漏风险，为FSO-GKA的安全认证提供了依据。该方案为构建高速密钥交换平台提供了一种新的途径。
Free-space optical (FSO) communications can offer secure connectivity thanks to the high directionality of the laser beam and the line-of-sight configuration. These security advantages are employed to realize high-speed key establishment between two distant parties, which is provably secure against an eavesdropper with unlimited computational resources. Besides, a well-maintained laser beam divergence allows group key agreement (GKA) among multiple parties. Here, we propose a novel method of GKA over FSO link—FSO-GKA. After numerically characterizing fundamental behaviors, we present a proof-of-concept demonstration of FSO-GKA using a 7.8-km terrestrial link. We achieve a group key rate of roughly 8 Mbps over a 58dB-loss channel based on 10-MHz on-off keying. We also investigate information leakage risks under several atmospheric conditions, which provides the basis for security certification of FSO-GKA. Our proposed scheme shows a new way to construct high-speed key exchange platforms.