Secrecy capacity of LiFi systems
Secrecy capacity of LiFi systems
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DOI：
10.1117/12.2575810
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发表时间：
2020-09
期刊：
影响因子：
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通讯作者：
Hanaa Abumarshoud;Mohammad Dehghani Soltani;M. Safari;H. Haas
中科院分区：
文献类型：
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作者：
Hanaa Abumarshoud;Mohammad Dehghani Soltani;M. Safari;H. Haas
射频（RF）信号通过我们周围的大多数材料传播，而光被许多这些材料阻挡。这一特性使得基于光的无线网络（也称为LiFi网络）本质上更加安全。然而，如果由于用户移动或设备方向的改变而导致合法的数据链路被阻塞，则也可能导致突然的链路故障。本文在考虑信道状态信息不完全、设备方向随机和链路阻塞概率的情况下，分析了单个窃听者的保密容量。人们已经发现，保密能力几乎翻了一番，在一个站立的活动，而不是坐着的活动和阻塞对象的密度降低了保密能力，在单接入点网络。很明显，环境因素和用户行为对保密性能有重大影响，因此，需要考虑LiFi网络中的鲁棒物理层安全（PLS）设计。
Radio frequency (RF) signals propagate through most materials that we are surrounded by while light is blocked by many of these materials. This feature makes wireless networks based on light (which are also referred to as LiFi networks) inherently more secure. However, it can also lead to sudden link failure if the legitimate data link is blocked because of user movements or changes in device orientation. In this paper, the secrecy capacity has been analysed with the consideration of imperfect channel state information, random device orientation and probability of link blockage for the case of a single eavesdropper. It has been found that the secrecy capacity almost doubles in a standing activity as opposed to a sitting activity and that the density of blocking objects degrades the secrecy capacity in single access point networks. It is evident that environmental factors and user behaviour have a significant impact on the secrecy performance and, thus, need to be considered for robust physical layer security (PLS) design in LiFi networks.