Precise channel estimation at the physical layer allows to authenticate the source of a message in a wireless environment without the need of a pre-shared secret key based on the rapid spatial decorrelation of the channel. We consider the authentication scheme proposed by Xiao et al. and modify to suit a wiretap environment with orthogonal frequency division multiplexing (OFDM) modulation and fading channels. By formulating a nearly optimal attack strategy, and allowing some correlation among the channels, we evaluate the robustness of the scheme against challenging conditions and discuss the choice of system parameters.

Physical Layer Authentication over an OFDM Fading Wiretap Channel

BARACCA, PAOLO;LAURENTI, NICOLA;TOMASIN, STEFANO
2011

Abstract

Precise channel estimation at the physical layer allows to authenticate the source of a message in a wireless environment without the need of a pre-shared secret key based on the rapid spatial decorrelation of the channel. We consider the authentication scheme proposed by Xiao et al. and modify to suit a wiretap environment with orthogonal frequency division multiplexing (OFDM) modulation and fading channels. By formulating a nearly optimal attack strategy, and allowing some correlation among the channels, we evaluate the robustness of the scheme against challenging conditions and discuss the choice of system parameters.
2011
1st International ICST Workshop on Secure Wireless Networks, SECURENETS
9781936968091
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11577/187247
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