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Paper Abstract and Keywords
Presentation 2017-03-03 15:50
A Study on the Secure Sharing of User Authentication Private Keys among Devices Belonging to the Same Owner
Hideo Nishimura, Yoshihiko Omori, Takao Yamashita, Tetsuya Iwata (NTT) IN2016-172
Abstract (in Japanese) (See Japanese page) 
(in English) In recent authentication based on the public-key cryptography, private keys are generated and kept inside the secure area of a device to prevent a key-theft. When users have multiple devices, this characteristic causes a usability issue that the users have to do re-registration a lot of times (per Web site and per device). In our existing approach, private keys are stored in an external keystore so that the devices can share the keys. However, the existing approach has a risk that the keys can be misused by attacking the keystore that is widely accessible via the Internet. In this paper, we propose an approach for sharing private keys directly among devices. In our new approach, the trusted third party ensures who owns a device by checking identity of the owner and allows key-sharing only among the devices belonging to the same owner. We also conducted a comparative evaluation of usability, deployability, and security of the new and the existing approaches.
Keyword (in Japanese) (See Japanese page) 
(in English) Web Authentication / Public Key Cryptography / Password-less / FIDO (Fast Identity Online) / / / /  
Reference Info. IEICE Tech. Rep., vol. 116, no. 485, IN2016-172, pp. 449-454, March 2017.
Paper # IN2016-172 
Date of Issue 2017-02-23 (IN) 
ISSN Print edition: ISSN 0913-5685    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 NS IN  
Conference Date 2017-03-02 - 2017-03-03 
Place (in Japanese) (See Japanese page) 
Place (in English) OKINAWA ZANPAMISAKI ROYAL HOTEL 
Topics (in Japanese) (See Japanese page) 
Topics (in English) General 
Paper Information
Registration To IN 
Conference Code 2017-03-NS-IN 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Study on the Secure Sharing of User Authentication Private Keys among Devices Belonging to the Same Owner 
Sub Title (in English)  
Keyword(1) Web Authentication  
Keyword(2) Public Key Cryptography  
Keyword(3) Password-less  
Keyword(4) FIDO (Fast Identity Online)  
Keyword(5)  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Hideo Nishimura  
1st Author's Affiliation NTT Corporation (NTT)
2nd Author's Name Yoshihiko Omori  
2nd Author's Affiliation NTT Corporation (NTT)
3rd Author's Name Takao Yamashita  
3rd Author's Affiliation NTT Corporation (NTT)
4th Author's Name Tetsuya Iwata  
4th Author's Affiliation NTT Corporation (NTT)
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Speaker Author-1 
Date Time 2017-03-03 15:50:00 
Presentation Time 20 minutes 
Registration for IN 
Paper # IN2016-172 
Volume (vol) vol.116 
Number (no) no.485 
Page pp.449-454 
#Pages 6 
Date of Issue 2017-02-23 (IN) 

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