Sciweavers

Share
WISEC
2010
ACM

On the reliability of wireless fingerprinting using clock skews

10 years 10 months ago
On the reliability of wireless fingerprinting using clock skews
Determining whether a client station should trust an access point is a known problem in wireless security. Traditional approaches to solving this problem resort to cryptography. But cryptographic exchange protocols are complex and therefore induce potential vulnerabilities in themselves. We show that measurement of clock skews of access points in an 802.11 network can be useful in this regard, since it provides fingerprints of the devices. Such fingerprints can be used to establish the first point of trust for client stations wishing to connect to an access point. Fingerprinting can also be used in the detection of fake access points. We demonstrate deficiencies of previously studied methods that measure clock skews in 802.11 networks by means of an attack that spoofs clock skews. We then provide means to overcome those deficiencies, thereby improving the reliability of fingerprinting. Finally, we show how to perform the clock-skew arithmetic that enables network providers to pu...
Chrisil Arackaparambil, Sergey Bratus, Anna Shubin
Added 14 May 2010
Updated 14 May 2010
Type Conference
Year 2010
Where WISEC
Authors Chrisil Arackaparambil, Sergey Bratus, Anna Shubina, David Kotz
Comments (0)
books