WLAN Device Fingerprinting using Channel State Information (CSI)

Abstract

As of IEEE 802.11n, a wireless Network Interface Card (NIC) uses Channel State Information (CSI) to optimize the transmission over multiple antennas. CSI contain radio-metrics such as amplitude and phase. Due to scattering during hardware production these metrics exhibit unique properties. Since these information are transmitted unencrypted, they can be captured by a passive observer. We show that these information can be used to create a unique fingerprint of a wireless device, based on as little as 100 CSI packets per device collected with an off-the-shelf Wi-Fi card. For our proof of concept we captured data from seven smartphones including two identical models. We were able to identify more than 90% when using out-of-the-box Random Forrest (RF). mehr

Mehr zum Titel

Titel	WLAN Device Fingerprinting using Channel State Information (CSI)
Medien	WiSec '18: Proceedings of the 11th ACM Conference on Security & Privacy in Wireless and Mobile
Verlag	ACM
Verfasser	Prof. Dr. Florian Adamsky, Tatiana Retunskaia, Stefan Schiffner, Christian Köbel, Thomas Engel
Seiten	277-278
Veröffentlichungsdatum	18.06.2018
Zitation	Adamsky, Florian; Retunskaia, Tatiana; Schiffner, Stefan; Köbel, Christian; Engel, Thomas (2018): WLAN Device Fingerprinting using Channel State Information (CSI). WiSec '18: Proceedings of the 11th ACM Conference on Security & Privacy in Wireless and Mobile , 277-278. DOI: 10.1145/3212480.3226099