Abstract

Despite the important role that WiFi networks play in home and enterprise networks they are relatively weak from a security stand-point. With easily available directional antennas, attackers can be physically located off-site, yet compromise WiFi security proto-cols such as WEP, WPA, and even to some extent WPA2 through a range of exploits specific to those protocols, or simply by run-ning dictionary and human-factors attacks on users ’ poorly-chosen passwords. This presents a security risk to the entire home or enterprise network. To mitigate this ongoing problem, we pro-pose SecureArray, a system designed to operate alongside exist-ing wireless security protocols, adding defense in depth against active attacks. SecureArray’s novel signal processing techniques leverage multi-antenna access point (AP) to profile the directions at which a client’s signals arrive, using this angle-of-arrival (AoA)