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Paper Abstract and Keywords
Presentation 2024-11-15 08:55
A Feasibility of Self-Interference Suppression Method in Echo TEMPEST Using Frequency Conversion
Ryo Nagoshi, Shugo Kaji, Daisuke Fujimoto, Yuichi Hayashi (NAIST) EMCJ2024-70
Abstract (in Japanese) (See Japanese page) 
(in English) Echo TEMPEST is a threat in which an attacker intentionally irradiates electromagnetic (EM) waves at specific fre-quencies to forcibly leak internal information from devices via EM emissions. One of the main challenges in executing these threats is self-interference caused by EM coupling between the transmitting (TX) and receiving (RX) antennas, which reduces the modulation depth of the Echo signal and makes information retrieval challenging. This paper demonstrates that it is possible to suppress self-interference by generating the Echo at a frequency different from the irradiated frequencies using frequency conversion facilitated by nonlinear elements within the target device. By irradi-ating EM waves at two different frequencies, the method leverages device-induced frequency conversion to produce the Echo at a new frequency, effectively mitigating self-interference effects. Experimental validation was conducted using a device that transmitted Universal Asynchronous Receiver/Transmitter signals. The results demonstrated that, even with limitations on antenna placement, the proposed method successfully retrieved the transmitted information by amplitude demodulating the Echo at the converted frequency. This confirms the feasibility of executing Echo TEMPEST under challenging conditions and suggests potential applicability to other communication protocols and devices.
Keyword (in Japanese) (See Japanese page) 
(in English) Echo TEMPEST / EM information leakage / Frequency conversion / Self-interference / / / /  
Reference Info. IEICE Tech. Rep., vol. 124, no. 258, EMCJ2024-70, pp. 1-4, Nov. 2024.
Paper # EMCJ2024-70 
Date of Issue 2024-11-08 (EMCJ) 
ISSN Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF EMCJ2024-70

Conference Information
Committee EMCJ  
Conference Date 2024-11-15 - 2024-11-15 
Place (in Japanese) (See Japanese page) 
Place (in English) Kumwell Academy (Thailand) 
Topics (in Japanese) (See Japanese page) 
Topics (in English) EMC Joint Workshop 2024, Bangkok 
Paper Information
Registration To EMCJ 
Conference Code 2024-11-EMCJ 
Language English 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Feasibility of Self-Interference Suppression Method in Echo TEMPEST Using Frequency Conversion 
Sub Title (in English)  
Keyword(1) Echo TEMPEST  
Keyword(2) EM information leakage  
Keyword(3) Frequency conversion  
Keyword(4) Self-interference  
Keyword(5)  
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1st Author's Name Ryo Nagoshi  
1st Author's Affiliation Nara Institute of Science and Technology (NAIST)
2nd Author's Name Shugo Kaji  
2nd Author's Affiliation Nara Institute of Science and Technology (NAIST)
3rd Author's Name Daisuke Fujimoto  
3rd Author's Affiliation Nara Institute of Science and Technology (NAIST)
4th Author's Name Yuichi Hayashi  
4th Author's Affiliation Nara Institute of Science and Technology (NAIST)
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Speaker Author-1 
Date Time 2024-11-15 08:55:00 
Presentation Time 20 minutes 
Registration for EMCJ 
Paper # EMCJ2024-70 
Volume (vol) vol.124 
Number (no) no.258 
Page pp.1-4 
#Pages 4 
Date of Issue 2024-11-08 (EMCJ) 

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