A Reconfigurable Antenna-Based Solution for Stationary Device Authentication in Wireless Networks

[摘要] Applying channel information for user authentication is gaining attention in the area of wireless network security. Similarly, reconfigurable antennas capable of generating multiple decorrelated channel realizations have becomeincreasingly popular in wireless systems. In this paper we propose and evaluate a channel-based authenticationscheme that applies the capabilities of a pattern reconfigurable antenna for improved performance in userauthentication. Field measurements of the channel frequency response employing such an antenna wereperformed to quantify the performance of the proposed scheme. Based on these measurements, we show theeffect of correlation that exists between the different modes on the authentication performance. Furthermore,the performance gain that can be achieved by the scheme is studied as a function of the number of antennamodes. Offline mode analysis is performed to give a loose upper bound on performance while online modeanalysis results are presented to quantify achievable authentication performance in realtime. A general guidelineon how to choose the different elements of the decision metric in order to realize better performance for physicallayer-based authentication schemes based on any diversity scheme is also developed.

[学科分类] 电子、光学、磁材料