We demonstrate empirically a physical layer authentication method that uses the physical attributes of OQPSK RF signals transmitted from IEEE 802.15.4 WSN nodes, collecting data with a USRP1 software-defined radio platform. We present simple training and classification algorithm alternatives and measure and analyze the performance of the overall combination. We improve classification performance using a simple method at the receiver that discards samples using preamble PN chip error information and estimates a phase offset between the transmitting node's RF clock and the receiver's sampling clock.

Additional Metadata
Keywords Authentication, Experiment, RF fingerprint, Security, Wireless Sensor Network (WSN)
Persistent URL dx.doi.org/10.1109/IWCMC.2012.6314260
Conference 8th IEEE International Wireless Communications and Mobile Computing Conference, IWCMC 2012
Citation
Knox, D.A., & Kunz, T. (2012). Practical RF fingerprints for Wireless Sensor Network authentication. Presented at the 8th IEEE International Wireless Communications and Mobile Computing Conference, IWCMC 2012. doi:10.1109/IWCMC.2012.6314260