An Investigation of THz Backscattered Side-Channels Measurement at a Distance

This paper presents the measurement setup and the investigation on the backscatter side-channel signal detected and received, at 300GHz, from an activated FPGA board. First, the ellipsoidal reflector, used as an incident source, with a spot size of 0.7mm is designed and fabricated. Next, a region on the FPGA chip is divided geometrically into various cells with cell dimensions corresponding to reflector spot size. Finally, it was shown that the backscatter side-channel signal can be detected by a diagonal horn antenna placed at a distance from the FPGA board. The received signal behavior is investigated in terms of absolute signal strength, measured noise power level and signal to noise ratio. This provides deeper insight into the detected backscatter side-channel emanating from the FPGA board.

[1]  Alenka G. Zajic,et al.  Statistical Characterization of 300-GHz Propagation on a Desktop , 2015, IEEE Transactions on Vehicular Technology.

[2]  Wei Zhang,et al.  A Miniature Ultrawideband Electric Field Probe Based on Coax-Thru-Hole via Array for Near-Field Measurement , 2017, IEEE Transactions on Instrumentation and Measurement.

[3]  Carlos Bustamante,et al.  Design and application of a computer‐controlled confocal scanning differential polarization microscope , 1988 .

[4]  M. Missori,et al.  Confocal Imaging at 0.3 THz With Depth Resolution of a Painted Wood Artwork for the Identification of Buried Thin Metal Foils , 2018, IEEE Transactions on Terahertz Science and Technology.

[5]  A. Zajić,et al.  THz Near Field Focusing using Cassegranian Configuration for EM Side-channel Detection , 2018, 2018 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting.

[6]  Y. Hayashi,et al.  Analysis of Electromagnetic Information Leakage From Cryptographic Devices With Different Physical Structures , 2013, IEEE Transactions on Electromagnetic Compatibility.

[7]  M. G. Kuhn,et al.  Compromising Emanations of LCD TV Sets , 2013, IEEE Transactions on Electromagnetic Compatibility.

[8]  Milos Prvulovic,et al.  Exploiting Switching of Transistors in Digital Electronics for RFID Tag Design , 2019, IEEE Journal of Radio Frequency Identification.

[9]  D. Uchida,et al.  Novel high-spatial resolution probe for electric near-field measurement , 2011, 2011 IEEE Radio and Wireless Symposium.

[10]  H. Sekiguchi,et al.  Study on Maximum Receivable Distance for Radiated Emission of Information Technology Equipment Causing Information Leakage , 2013, IEEE Transactions on Electromagnetic Compatibility.