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Short paper: gathering tamper evidence in wi-fi networks based on channel state information

Research output: Contribution in Book/Report/ProceedingsPaper


Publication date23/07/2014
Host publicationWiSec '14 Proceedings of the 2014 ACM conference on Security and privacy in wireless & mobile networks
Place of PublicationNew York
PublisherACM Press
Number of pages6
ISBN (Electronic)9781450329729
<mark>Original language</mark>English


Wireless devices are often used in application scenarios with strict security requirements. Examples are physical intru- sion detection systems commonly used to protect factories, airports or government buildings. In such scenarios, addi- tional security features such as tamper detection are highly desirable to complement traditional cryptographic mecha- nisms. In this paper we use channel state information (CSI), extracted from off-the-shelf 802.11n Wi-Fi cards, to calcu- late a tamper-evidence value for transmitters. This value enables detection of tampering due to device movement or replacement. We describe algorithms for tamper-evidence value computation, discuss the interpretation of this value and evaluate its effectiveness.