Secure Over-the-Air Computation using Zero-Forced Artificial Noise

• URL: http://arxiv.org/abs/2212.04288v1
• Date: Thu, 8 Dec 2022 14:30:59 GMT
• Title: Secure Over-the-Air Computation using Zero-Forced Artificial Noise
• Authors: Luis Ma{\ss}ny, Antonia Wachter-Zeh
• Abstract summary: We consider over-the-air computation over block-fading additive white Gaussian noise channels in the presence of a passive eavesdropper. We propose a scheme that achieves MSE-security against the eavesdropper by employing zero-forced artificial noise.
• Score: 24.91252655705963
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Over-the-air computation has the potential to increase the communication-efficiency of data-dependent distributed wireless systems, but is vulnerable to eavesdropping. We consider over-the-air computation over block-fading additive white Gaussian noise channels in the presence of a passive eavesdropper. The goal is to design a secure over-the-air computation scheme. We propose a scheme that achieves MSE-security against the eavesdropper by employing zero-forced artificial noise, while keeping the distortion at the legitimate receiver small. In contrast to former approaches, the security does not depend on external helper nodes to jam the eavesdropper's receive signal. We thoroughly design the system parameters of the scheme, propose an artificial noise design that harnesses unused transmit power for security, and give an explicit construction rule. Our design approach is applicable both if the eavesdropper's channel coefficients are known and if they are unknown in the signal design. Simulations demonstrate the performance, and show that our noise design outperforms other methods.

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