论文标题
关于金纳米颗粒授权的可见光通信的物理层安全性
On the Physical Layer Security of Visible Light Communications Empowered by Gold Nanoparticles
论文作者
论文摘要
可见光是在室内场景中具有很高的方向性和不渗透性，是安全无线通信的适当频谱。但是，如果窃听者的位置非常接近合法的接收器，则安全通信将变得高度风险。在本文中，为了进一步提高可见光通信（VLC）的安全水平，并提高其对恶意攻击的弹性，我们建议利用具有圆形极化光的最近合成的金纳米粒子（GNP）来利用最近合成的金纳米粒子（GNP），从而导致相位迟缓，从而与线性偏（线性偏（线性偏极）相互作用。明智地堆叠许多GNP制作的GNP板作为物理秘密钥匙。发射器同时发送预期的符号和人造噪声来利用GNP板的通道变化效果，当窃听器紧密地位于合法接收器时，这是非常有效的。首先是通过代表圆形极化结构域中的GNP板和线性极化器的效果来开发新的VLC通道模型。基于新的通道模型，考虑到GNP板的效果提高了窃听场景中的保密率，因此对发射器和合法接收器处的线性极化器的角度进行了优化。 Simulations verify that when the transmitters are equipped with GNP plates, even if the eavesdropper is located right next to the legitimate receiver, insightful results on the physical layer security metrics are gained as follows: 1) the secrecy rate is significantly improved and 2) the symbol error rate gap between the legitimate receiver and eavesdropper becomes much larger due to the chiroptical properties of GNP plates.
Visible light is a proper spectrum for secure wireless communications because of its high directivity and impermeability in indoor scenarios. However, if an eavesdropper is located very close to a legitimate receiver, secure communications become highly risky. In this paper, to further increase the level of security of visible light communication (VLC) and increase its resilience against to malicious attacks, we propose to capitalize on the recently synthesized gold nanoparticles (GNPs) with chiroptical properties for circularly polarized light resulting the phase retardation that interacts with the linear polarizer angle. GNP plates made by judiciously stacking many GNPs perform as physical secret keys. Transmitters send both the intended symbol and artificial noise to exploit the channel variation effect by the GNP plates, which is highly effective when an eavesdropper is closely located to the legitimate receiver. A new VLC channel model is first developed by representing the effect of GNP plates and linear polarizers in the circular polarization domain. Based on the new channel model, the angles of linear polarizers at the transmitters and legitimate receiver are optimized considering the effect of GNP plates to increase the secrecy rate in wiretapping scenarios. Simulations verify that when the transmitters are equipped with GNP plates, even if the eavesdropper is located right next to the legitimate receiver, insightful results on the physical layer security metrics are gained as follows: 1) the secrecy rate is significantly improved and 2) the symbol error rate gap between the legitimate receiver and eavesdropper becomes much larger due to the chiroptical properties of GNP plates.
