Network Security through Wireless Location Systems

André Peres (Federal Institute of Science and Technology – Rio Grande do Sul, IFRS, Porto Alegre, Brazil) and Raul Fernando Weber (Instituto de Informática, UFRGS, Porto Alegre, Brazil)
Copyright: © 2011 |Pages: 251
EISBN13: 9781609606558|DOI: 10.4018/978-1-60960-015-0.ch014
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The advantage of wireless local area networks, giving the mobile stations the possibility of moving freely inside the network access range comes with a security drawback. The fact that microwave signals can transpose walls and suffers with attenuation, reflections, refraction, diffraction and dispersion, depending of the obstacles, makes very difficult to define the network access range. Without the knowledge of the network boundaries, the network administrator cannot define a physical delimiter to network access. Without the user-location, it is impossible to restrict the network access based on the physical access boundaries defined by the administrator. When the wireless network operates indoor, the many obstacles and the dynamic behavior of these obstacles (some people moving around, for instance) make the microwave signal behavior change the range and aspect of the network. This work proposes a new approach to indoor user-location mechanism, based on the dynamic behavior of the obstacles and consequent changes on network range in IEEE 802.11 networks. Finally a new authentication system WlanAuth, based on the user location is proposed.
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