| 日時(Date) |
2025年10月27日 (月) / Oct. 27th, 2025 (Mon.) 2限 (11:00--12:30) / 2nd period (11:00--12:30) |
|---|---|
| 場所(Location) | L1 |
| 司会(Chair) | Hayashi sensei |
| 講演者(Presenter) | François Sarrazin (Junior professor chair, University of Rennes (IETR laboratory), France.) |
| 題目(Title) | RF Retroreflector Attacks: multi-trojan scenario and attacks through a disordered media |
| 概要(Abstract) | Electromagnetic leakage eavesdropping is becoming an increasingly accessible attack vector, largely due to the widespread availability of software-defined radio technology. So-called "TEMPEST" attacks exploit unintended electromagnetic emissions—such as those from a computer screen—by passively intercepting these signals to reconstruct transmitted data. However, the range and characteristics of such emissions are often unpredictable and difficult to control.To address these limitations, hardware implants have been developed to extract data in a more reliable and controlled manner, albeit through a more invasive approach compared to opportunistic leakage. In this talk, we will present recent advancements in the development of hardware Trojans that utilize backscattering techniques for remote data exfiltration. We will first explore the concept of multi-Trojan systems, which enable the interception of multiple data sources simultaneously. Following this, we will demonstrate the application of wavefront shaping—implemented via a programmable leaky cavity—to counteract the signal attenuation caused by multiple scattering in disordered environments. |
| 講演言語(Language) | English |
| 講演者紹介(Introduction of Lecturer) | François Sarrazin received the M.S. degree in electronics and electrical engineering from Polytech'Nantes (France), in 2010, and the Ph.D. degree from the University of Rennes 1 (IETR laboratory, France), in 2013. In 2014, he worked as a post-doctorate fellow at the Royal Military College of Canada in Kingston, Ontario. From 2010 to 2014, his research was focused on antenna characterization using the Singularity Expansion Method (SEM) applied both in the time and spatial domains. In 2015, he worked as a research engineer at the CEA-Léti (Grenoble, France) and did his research on electrically-small frequency-agile antenna and radiation efficiency optimization. From 2016 to 2022, he was an associate professor at Université Gustave Eiffel (ESYCOM laboratory, Paris area). Since September 2022, he is "Junior Professor Chair" at Université de Rennes (IETR laboratory, France). His research activities include electromagnetic cybersecurity, and contactless antenna measurement whithin reverberation chambers. |