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On proactive eavesdropping using anti-relay-selection jamming in multi-relay communication systems

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This paper considers a multi-relay legitimate surveillance system, where a suspicious link may transmit illegal information with the help of relays and a legitimate monitor aims at intercepting the information. We assume that the relay selection method is adopted by the suspicious link to improve the efficiency of the information transmission. We propose anti-relay-selection (ARS) jamming strategies for two different information transmission scenarios, namely the event-based information and content-based information. Beamforming vector of jamming is optimized and the iterative algorithms are used to improve the jamming efficiency. We demonstrate the effectiveness and the superiority of the ARS jamming strategies through numerical results and simulations.

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This work was supported by National Natural Science Foundation of China (Grant Nos. 61871241, 61771263, 61801248) and Nature Science Foundation of the Jiangsu Higher Education Institutions of China (Grant No. 18KJB510036).

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Correspondence to Shibing Zhang.

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Hu, Y., Gao, R., Li, Y. et al. On proactive eavesdropping using anti-relay-selection jamming in multi-relay communication systems. Sci. China Inf. Sci. 62, 42304 (2019). https://doi.org/10.1007/s11432-018-9660-0

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  • physical layer security
  • proactive eavesdropping
  • anti-relay-selection jamming
  • multi-relay
  • beamforming