A channel-based hypothesis testing approach to enhance user authentication in wireless networks

Jitendra Tugnait, Hyosung Kim
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引用次数: 60

Abstract

We consider a physical layer approach to enhance wireless security by using the unique wireless channel state information (CSI) of a legitimate user to authenticate subsequent transmissions from this user, thereby denying access to any spoofer whose CSI would significantly differ from that of the legitimate user by virtue of a different spatial location. In some existing approaches, multicarrier systems have been considered where the channel frequency response at distinct frequencies is used to devise a hypothesis testing approach: is the CSI of the current transmission (packet) the same as that of the previous transmission? In this paper we investigate a single-carrier timedomain approach via either residual testing or time-domain CSI comparison. A hypothesis testing approach is formulated to test whiteness of residuals from current transmission where the residuals are generated using the estimated channel from the previous transmission. We also consider a hypothesis testing approach where the time-domain CSI of the current transmission is compared with that of the previous transmission. Two binary hypothesis testing approaches are formulated and illustrated via simulations.
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一种基于信道假设检验的无线网络用户认证方法
我们考虑了一种物理层方法,通过使用合法用户的唯一无线信道状态信息(CSI)来验证来自该用户的后续传输,从而拒绝访问任何CSI与合法用户的CSI因不同的空间位置而显着不同的欺骗者。在一些现有的方法中,已经考虑了多载波系统,其中使用不同频率下的信道频率响应来设计假设检验方法:当前传输(分组)的CSI是否与先前传输的CSI相同?本文通过残差检验和时域CSI比较研究了一种单载波时域方法。提出了一种假设检验方法来检验当前传输残差的白度,其中残差是使用先前传输的估计信道产生的。我们还考虑了一种假设检验方法,其中将当前传输的时域CSI与先前传输的CSI进行比较。提出了两种二元假设检验方法,并通过仿真加以说明。
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