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Paper Abstract and Keywords
Presentation 2021-03-01 09:10
On the Privacy Risk of Exposure Notification Framework: Assessment and Countermeasures
Kazuki Nomoto (Waseda Univ.), Mitsuaki Akiyama (NTT), Masashi Eto (NICT), Atsuo Inomata (Osaka Univ.), Tatsuya Mori (Waseda Univ./NICT) ICSS2020-34
Abstract (in Japanese) (See Japanese page) 
(in English) The Exposure Notification Framework uses the Bluetooth Low Energy (BLE) signal generated by a smartphone to determine close contact with a positive person. It is used in COVID-19 contact tracing applications. This decentralized mechanism exchanges anonymous identifiers. The risk of privacy violation is considered to be low. However, there are still insufficient studies on the risks from the technical aspects of the signal strength and transmission cycle of the radio waves emitted by smartphones. In this study, we focus on the privacy risk of Google/Apple's Exposure Notification, and evaluate the threat by field experiments and simulations, focusing on the privacy risk of identifying the facial image of a positive person by using the BLE signal strength and camera images. We will also propose and evaluate effective countermeasures.
Keyword (in Japanese) (See Japanese page) 
(in English) Contact tracing / Exposure Notification / COVID-19 / / / / /  
Reference Info. IEICE Tech. Rep., vol. 120, no. 384, ICSS2020-34, pp. 49-54, March 2021.
Paper # ICSS2020-34 
Date of Issue 2021-02-22 (ICSS) 
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 ICSS IPSJ-SPT  
Conference Date 2021-03-01 - 2021-03-02 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Security, Trust, etc. 
Paper Information
Registration To ICSS 
Conference Code 2021-03-ICSS-SPT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) On the Privacy Risk of Exposure Notification Framework: Assessment and Countermeasures 
Sub Title (in English)  
Keyword(1) Contact tracing  
Keyword(2) Exposure Notification  
Keyword(3) COVID-19  
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1st Author's Name Kazuki Nomoto  
1st Author's Affiliation Waseda University (Waseda Univ.)
2nd Author's Name Mitsuaki Akiyama  
2nd Author's Affiliation NTT Secure Platform Laboratories (NTT)
3rd Author's Name Masashi Eto  
3rd Author's Affiliation National Institute of Information and Communications Technology (NICT)
4th Author's Name Atsuo Inomata  
4th Author's Affiliation Osaka University (Osaka Univ.)
5th Author's Name Tatsuya Mori  
5th Author's Affiliation Waseda University/National Institute of Information and Communications Technology (Waseda Univ./NICT)
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Speaker Author-1 
Date Time 2021-03-01 09:10:00 
Presentation Time 25 minutes 
Registration for ICSS 
Paper # ICSS2020-34 
Volume (vol) vol.120 
Number (no) no.384 
Page pp.49-54 
#Pages 6 
Date of Issue 2021-02-22 (ICSS) 

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