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Paper Abstract and Keywords
Presentation 2023-05-12 13:15
Evaluating Transmission Efficiency Impact on Screen Reconstruction Accuracy for High-Resolution Displays
Taiki Kitazawa, Yuichi Hayashi (NAIST) EMCJ2023-6
Abstract (in Japanese) (See Japanese page) 
(in English) In TEMPEST attacks targeting high-resolution displays with divided screens, reconstructing screen information proves difficult using conventional methods due to multiple emanation sources. This complexity arises as each pixel is transmitted via a distinct path, leading to an overlap of pixel information in the reconstructed images. To address this issue, we have proposed a method for reconstructing images on multi-area displays by leveraging differences in transfer efficiencies between emanation sources on each screen area and the measurement point, thereby separating screen information. Nonetheless, we have observed that reconstruction accuracy varies depending on the measurement parameters used to create differences in transfer efficiencies. The optimal selection of measurement parameters to yield highly accurate reconstruction still needs to be investigated. In this study, we examined the impact of measurement parameters on the reconstruction accuracy of reconstructed images, emphasizing measurement positions and receiving frequencies as variables to alter transfer efficiencies. By controlling emission intensity based on screen image operations and measuring their spectrum, we were able to evaluate the effects of measurement positions and receiving frequencies on transfer efficiencies. Moreover, we assessed the reconstruction accuracy of reconstructed images while modifying measurement parameters through convolutional neural networks. Our evaluations revealed that the reconstruction rate was approximately 30% when altering measurement positions and about 55% when adjusting receiving frequencies. Consequently, we confirmed that modifying receiving frequencies can enhance the separation accuracy of screen information, resulting in a higher information reconstruction rate.
Keyword (in Japanese) (See Japanese page) 
(in English) TEMPEST / electromagnetic information leakage / high-resolution display / convolutional neural network / independent component analysis / / /  
Reference Info. IEICE Tech. Rep., vol. 123, no. 20, EMCJ2023-6, pp. 1-6, May 2023.
Paper # EMCJ2023-6 
Date of Issue 2023-05-05 (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)
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Conference Information
Committee EMCJ IEE-EMC IEE-SPC  
Conference Date 2023-05-12 - 2023-05-12 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
Topics (in English) EMC 
Paper Information
Registration To EMCJ 
Conference Code 2023-05-EMCJ-EMC-SPC 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Evaluating Transmission Efficiency Impact on Screen Reconstruction Accuracy for High-Resolution Displays 
Sub Title (in English)  
Keyword(1) TEMPEST  
Keyword(2) electromagnetic information leakage  
Keyword(3) high-resolution display  
Keyword(4) convolutional neural network  
Keyword(5) independent component analysis  
Keyword(6)  
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Keyword(8)  
1st Author's Name Taiki Kitazawa  
1st Author's Affiliation Nara Institute of Science and Technology (NAIST)
2nd Author's Name Yuichi Hayashi  
2nd Author's Affiliation Nara Institute of Science and Technology (NAIST)
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Speaker Author-1 
Date Time 2023-05-12 13:15:00 
Presentation Time 25 minutes 
Registration for EMCJ 
Paper # EMCJ2023-6 
Volume (vol) vol.123 
Number (no) no.20 
Page pp.1-6 
#Pages 6 
Date of Issue 2023-05-05 (EMCJ) 

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