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ROBin: Known-Plaintext Attack Resistant Orthogonal Blinding via Channel Randomization

机译：ROBin：通过通道随机化的已知明文攻击抵抗正交盲

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摘要

Orthogonal blinding based schemes for wireless physical layer security aim to achieve secure communication by injecting noise into channels orthogonal to the main channel and corrupting the eavesdropper’s signal reception. These methods, albeit practical, have been proven vulnerable against multiantenna eavesdroppers who can filter the message from the noise. The vulnerability is rooted in the fact that the main channel state remains static in spite of the noise injection, which allows an eavesdropper to estimate it promptly via known symbols and filter out the noise. Our proposed scheme leverages a reconfigurable antenna for Alice to rapidly change the channel state during transmission and a compressive sensing based algorithm for her to predict and cancel the changing effects for Bob. As a result, the communication between Alice and Bob remains clear, whereas randomized channel state prevents Eve from launching the knownplaintext attack. We formally analyze the security of the scheme against both single and multi-antenna eavesdroppers and identify its unique anti-eavesdropping properties due to the artificially created fast-changing channel. We conduct extensive simulations and real-world experiments to evaluate its performance. Empirical results show that our scheme can suppress Eve’s attack success rate to the level of random guessing, even if she knows all the symbols transmitted through other antenna modes.
机译：基于正交盲的无线物理层安全方案旨在通过将噪声注入正交于主信道的信道并破坏窃听者的信号接收来实现安全通信。这些方法尽管实用，但已被证明可以抵抗多天线窃听者的攻击，因为窃听者可以从噪声中过滤出消息。该漏洞的根源在于尽管有噪声注入，但主通道状态仍保持静态，这使窃听者可以通过已知符号迅速对其进行估计并滤除噪声。我们提出的方案利用可重构天线使爱丽丝在传输过程中快速改变信道状态，并利用基于压缩感测的算法来预测和消除鲍勃的变化效果。结果，Alice和Bob之间的通信保持清晰，而随机信道状态阻止了Eve发起已知的明文攻击。我们针对单天线窃听器和多天线窃听器正式分析了该方案的安全性，并确定了由于人为创建的快速变化的信道而具有的独特的防窃听特性。我们进行了广泛的模拟和实际实验，以评估其性能。实验结果表明，即使她知道通过其他天线模式发送的所有符号，我们的方案也可以将夏娃的攻击成功率抑制到随机猜测的水平。

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