Physical layer authentication for mobile terminals over MIMO fading wiretap channels

Information security remains a challenging issue in wireless communication due to the broadcast nature of their channels. Source of a message can be authenticated by precise channel estimation of the physical layer without sharing secret key. The response of channel decorrelates rapidly because of the moving transmitter. In this paper, the effect of transmitter velocity on the authentication scheme with the help of hypothesis testing in the multiple wiretap environment is analysed. Optimal attack strategy has been applied for the moving legitimate user and the performance is evaluated in a multiple input multiple output (MIMO)/orthogonal frequency division multiplexing (OFDM) scenario.