Security Analysis of Triangle Channel-Based Physical Layer Key Generation in Wireless Backscatter Communications
Security Analysis of Triangle Channel-Based Physical Layer Key Generation in Wireless Backscatter Communications
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DOI：
10.1109/tifs.2022.3224852
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发表时间：
2023
影响因子：
6.8
通讯作者：
Jiajun Li;Pu Wang;Long Jiao;Zheng Yan;K. Zeng;Yishan Yang
中科院分区：
文献类型：
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作者：
Jiajun Li;Pu Wang;Long Jiao;Zheng Yan;K. Zeng;Yishan Yang
环境反向散射通信（AmBC）通过反向散射环境射频（RF）信号并同时收集能量来实现超低功率通信。它已成为支持各种物联网（IoT）应用的尖端技术。然而，现有的研究缺乏有效的秘密密钥共享方案，以保障资源受限的反向散射设备（BD）之间的AmBC系统的通信。在本文中，我们提出，三信道，一种新的物理层密钥生成方案之间的两个BD通过乘以下行链路信号和反向散射信号，以获得一个三角形信道的信息作为共享的随机秘密源密钥生成。特别地，我们分析了我们的方案在被动和主动攻击下的安全性，具体地说，是在丢弃攻击（EA）、控制信道攻击（CCA）、信号操纵攻击（SMA）和不可信射频源攻击（URSA）下的安全性。通过理论分析和仿真实验，与传统的信道方案相比，该方案在EA攻击和两种主动攻击（CCA和SMA）下的性能均优于传统的信道方案。此外，它表现出更好的安全性能下URSA，这是提出的基础上的BD在三通道的未经认证的特性，即使URSA是更重要的比SMA。具体地说，在上述四种被动攻击和主动攻击下，三通道的密钥速率（SKR）优于三通道。这意味着我们的方案是先进的安全性和效率的密钥生成。大量的仿真进一步验证了我们的理论分析结果。
Ambient backscatter communication (AmBC) enables ultra-low-power communications by backscattering ambient radio frequency (RF) signals and harvesting energy simultaneously. It has emerged as a cutting-edge technology for supporting a variety of Internet of Things (IoT) applications. However, existing research lacks effective secret key sharing schemes for safeguarding communications between resource-constrained backscatter devices (BDs) in AmBC systems. In this paper, we present, Tri-Channel, a novel physical layer key generation scheme between two BDs by multiplying downlink signals and backscatter signals to obtain the information of a triangle channel as a shared random secret source for key generation. In particular, we analyze the security of our scheme under both passive and active attacks, concretely Eavesdropping Attack (EA), Control Channel Attack (CCA), Signal Manipulative Attack (SMA), and Untrusted RF-Source Attack (URSA). Through theoretical analysis and simulations by comparing with a traditional scheme (named Tradi-Channel), we found that our scheme consistently outperforms the Tradi-Channel under the EA and two active attacks (CCA and SMA). In addition, it shows better security performance under URSA, which is proposed based on the unauthenticated characteristic of BDs in Tri-Channel, even though URSA is more vital than SMA. Concretely, Tri-Channel’s secret key rate (SKR) outperforms Tradi-Channel’s under the above four passive and active attacks. This implies that our scheme is advanced in terms of both security and efficiency of key generation. Numerous extensive simulations further prove our theoretical analysis results.