Detecting the presence of hidden wireless eavesdroppers
Chaman, Anadi
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https://hdl.handle.net/2142/102432
Description
Title
Detecting the presence of hidden wireless eavesdroppers
Author(s)
Chaman, Anadi
Issue Date
2018-11-15
Director of Research (if dissertation) or Advisor (if thesis)
Hassanieh, Haitham
Department of Study
Electrical & Computer Eng
Discipline
Electrical & Computer Engr
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
M.S.
Degree Level
Thesis
Keyword(s)
Wireless
Security
Eavesdroppers
Leakage
Abstract
This thesis explores the possibility of detecting the hidden presence of wireless eavesdroppers. Such eavesdroppers employ passive receivers that only listen and never transmit any signals, making them very hard to detect. We show that even passive receivers leak RF signals on the wireless medium. This RF leakage, however, is extremely weak and buried under noise and other transmitted signals that can be 3-5 orders of magnitude larger. Hence, it is missed by today's radios. We design and build Ghostbuster, the first device that can reliably extract this leakage, even when it is buried under ongoing transmissions, in order to detect the hidden presence of eavesdroppers. Ghostbuster does not require any modifications to current transmitters and receivers, and can accurately detect the eavesdropper in the presence of ongoing transmissions. Empirical results show that Ghostbuster can detect eavesdroppers with more than 95% accuracy up to 5 meters away.
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