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Demonstrating Practical Known-Plaintext Attacks against Physical Layer Security in Wireless MIMO Systems

Schulz, Matthias and Loch, Adrian and Hollick, Matthias (2016) Demonstrating Practical Known-Plaintext Attacks against Physical Layer Security in Wireless MIMO Systems. In: The 9th ACM Conference on Security and Privacy in Wireless and Mobile Networks (ACM WiSec 2016), 18-20 July 2016, Darmstadt, Germany.

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Abstract

After being widely studied in theory, physical layer security schemes are getting closer to enter the consumer market. Still, a thorough practical analysis of their resilience against attacks is missing. In this work, we use software-defined radios to implement such a physical layer security scheme, namely, orthogonal blinding. To this end, we use orthogonal frequency-division multiplexing (OFDM) as a physical layer, similarly to WiFi. In orthogonal blinding, a multi-antenna transmitter overlays the data it transmits with noise in such a way that every node except the intended receiver is disturbed by the noise. Still, our known-plaintext attack can extract the data signal at an eavesdropper by means of an adaptive filter trained using a few known data symbols. Our demonstrator illustrates the iterative training process at the symbol level, thus showing the practicability of the attack.

Item Type: Conference or Workshop Papers (Demo)
Uncontrolled Keywords: Physical layer security, orthogonal blinding, known-plaintext attack.
Subjects: UNSPECIFIED
Divisions: UNSPECIFIED
Depositing User: Adrian Loch
Date Deposited: 22 Jun 2016 11:07
Last Modified: 29 Jun 2016 08:49
URI: http://eprints.networks.imdea.org/id/eprint/1345

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