Orthogonality-Sabotaging Attacks against OFDMA-based Wireless Networks
Orthogonality-Sabotaging Attacks against OFDMA-based Wireless Networks
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DOI：
10.1109/infocom.2019.8737389
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发表时间：
2019-04
期刊：
影响因子：
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通讯作者：
Shangqing Zhao;Zhuo Lu;Z. Luo;Yao Liu
中科院分区：
文献类型：
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作者：
Shangqing Zhao;Zhuo Lu;Z. Luo;Yao Liu
无线干扰仍然是无线安全的主要威胁之一。传统上，干扰能够破坏其覆盖带宽内的无线信号，但不能超出其覆盖带宽。在本文中，我们提出了一种新的攻击策略，称为正交破坏攻击，对正交频分多址（OFDMA），已被广泛采用，在今天的无线网络标准（例如，4G/5G和802.11ax）。该攻击有意向OFDMA网络引入非对齐的窄带干扰信号，以破坏宽带信号中所有子载波之间的正交性。我们从理论上制定和优化的攻击策略，然后使用现实世界的实验表明，正交破坏是非常有效的，可以采取802.11ax网络只有1/5-1/4的全网络带宽。最后，我们提出了一种攻击识别和定位方法，以识别和定位正交破坏攻击在全频带频谱与92%的整体准确性和定位误差在约0.4个子载波间隔的实验。
Wireless jamming remains as one of the primary threats towards wireless security. Traditionally, jamming is able to disrupt wireless signals within, but not beyond, its covered bandwidth. In this paper, we propose a novel attack strategy, called orthogonality-sabotaging attack, against orthogonal frequency division multiple access (OFDMA) that has been widely adopted in today’s wireless network standards (e.g., 4G/5G and 802.11ax). The attack intentionally introduces an unaligned narrowband jamming signal to an OFDMA network so as to destroy the orthogonality among all subcarriers in broadband signals. We theoretically formulate and optimize the attack strategies, and then use real-world experiments to show that orthogonality sabotaging is very efficient and can take down an 802.11ax network with only 1/5-1/4 of the full network bandwidth. Finally, we propose an attack identification and localization method to identify and localize orthogonality-sabotaging attacks in the fullband spectrum with 92% overall accuracy and localization errors within about 0.4 subcarrier spacing in experiments.