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A Real-time Two-way Authentication Method Based on Instantaneous Channel State Information for Wireless Communication Systems

Xiangyu Lu1, Yuyan Zhang1, Yuexing Peng1, Hui Zhao1, 作者2, and Wenbo Wang3
Wireless Signal Processing & Network Lab, Key Lab of Universal Wireless Communications, Ministry of Education, Beijing University of Posts & Telecommunications, Beijing, China

Abstract—Traditional solutions handle security at the applica¬tion layer, which causes huge signaling overhead and long delay if authentication is implemented for every signal to enhance the security of wireless communication systems. In this paper, a real-time and two-way authentication method is proposed, which is based on the characteristics of radio channel including random¬ness and privacy. For the proposed method, the unique instant channel state information (CSI) can be used to authenticate the transmitter. In frequency-and time-selective fading channels, the current estimated CSI is compared with the predicted CSI, which is implemented at the previous frame, in order to authenticate the validation of the received signal. Both the hypothesis testing and mutual information measure methods are used for authentication determination, and the Mont Carlo simulation results verify the efficiency of the proposed method.

Index Terms—Physical-layer security; authentication; channel state information (CSI); channel estimation; channel prediction; hypothesis testing; mutual information measure.

Cite:Xiangyu Lu, Yuyan Zhang,  Yuexing Peng, Hui Zhao, and Wenbo Wang, "A Real-time Two-way Authentication Method Based on Instantaneous Channel State Information for Wireless Communication Systems," Journal of Communications, vol. 6, no.6, pp.471-476, 2011. Doi: 10.4304/jcm.6.6.471-476
 

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