This work investigates a measurement method for detecting the radio-frequency electromagnetic characteristics of an individual 802.11b wireless local-area network (WLAN) card--its electromagnetic signature--in the presence of an interfering signal. The method may present a way to identify individual wireless cards in a wireless network based on radio-frequency measurements, independent of any security protocols or anonymity protection features that may be applied in software. Here we explore the accuracy of the method in the presence of an interfering signal. The electromagnetic signature of each wireless card is first established in isolation. Then an interfering wireless card is placed in proximity of the original card. This study demonstrates that we can still identify the cards even when the interfering wireless card is present.
Conference Dates: September 29, 2006
Conference Location: Los Angeles, CA
Conference Title: ACM Workshop on Wireless Security
Pub Type: Conferences
privacy, RFID, security, taxonomy