arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0907.4919cs.CR
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时变信道中使用物理层进行无线认证

Using the Physical Layer for Wireless Authentication in Time-Variant Channels

Liang Xiao, Larry Greenstein, Narayan Mandayam, Wade Trappe

摘要:

无线介质包含可用于补充和增强传统安全机制的特定于域的信息。在本文中,我们提出了利用空间变异性的无线电信道响应在一个丰富的散射环境,是典型的室内环境。具体来说,我们描述了一个物理层认证算法,利用信道探测和假设检验,以确定当前和以前的通信尝试是否由相同的发送终端。通过这种方式,可以可靠地认证合法用户,并且可以可靠地检测虚假用户。我们分析了接收机的能力,以区分发射机(用户),根据他们的信道频率响应。这项工作是基于广义信道响应的空间和时间的变化,并考虑时间,频率和空间域之间的相关性。仿真结果,使用射线跟踪工具WiSE生成的时间平均响应,验证了该方法在实际信道条件下的有效性,以及其在未知信道变化下工作的能力。

英文摘要:

The wireless medium contains domain-specific information that can be used to complement and enhance traditional security mechanisms. In this paper we propose ways to exploit the spatial variability of the radio channel response in a rich scattering environment, as is typical of indoor environments. Specifically, we describe a physical-layer authentication algorithm that utilizes channel probing and hypothesis testing to determine whether current and prior communication attempts are made by the same transmit terminal. In this way, legitimate users can be reliably authenticated and false users can be reliably detected. We analyze the ability of a receiver to discriminate between transmitters (users) according to their channel frequency responses. This work is based on a generalized channel response with both spatial and temporal variability, and considers correlations among the time, frequency and spatial domains. Simulation results, using the ray-tracing tool WiSE to generate the time-averaged response, verify the efficacy of the approach under realistic channel conditions, as well as its capability to work under unknown channel variations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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