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Paper Abstract and Keywords
Presentation 2013-11-22 14:55
Stochastic Resonance and The Secrecy Capacity of Wiretap Channels
Oussama Souihli (KDDI R&D Labs), Tomoaki Ohtsuki (Keio Univ.) RCS2013-204
Abstract (in Japanese) (See Japanese page) 
(in English) Traditionally, physical-layer security is achieved by providing the legitimate receiver a physical-layer advantage over the eavesdropper or, equivalently, by making the eavesdropper's channel more degraded than the legitimate user's, in what is known as the degraded wiretap channel. Such physical-layer advantages can, however, be somewhat easily leveraged by the eavesdropper as the latter may, for instance, degrade the eavesdropper's channel through e.g. a jamming signal applied to the legitimate receiver's channel. To our knowledge, there are no works in the literature that have achieved physical-layer security over a channel where the eavesdropper has the physical-layer advantage over the legitimate user. Thus, we take aim in this work at achieving secrecy in such scenario where the eavesdropper's signal-to-noise ratio (SNR) is better than the legitimate receiver's, a scenario that we call the reversely-degraded wiretap channel. Precisely, we show that by constraining the transmitter's input to be discrete uniform distributed (such as an on-off keying modulation) and by using nonlinear threshold-based detection, the legitimate receiver is guaranteed to have a positive secrecy capacity even though the eavesdropper has a better receive SNR. The former requirement on the input distribution is to limit the capacity gains of the eavesdropper at high SNR. The latter requirement allows the communication channel to exhibit supra-threshold stochastic resonance, a phenomenon whereby noise increases the legitimate receiver's mutual information (and, in turn, the secrecy capacity). A numerical example is provided to confirm the above claims.
Keyword (in Japanese) (See Japanese page) 
(in English) Information Security / Physical-Layer Security / Low SNR Communications / Stochastic Resonance / Information Theory / Wiretap Channel / /  
Reference Info. IEICE Tech. Rep., vol. 113, no. 301, RCS2013-204, pp. 177-182, Nov. 2013.
Paper # RCS2013-204 
Date of Issue 2013-11-13 (RCS) 
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 RCS AP  
Conference Date 2013-11-20 - 2013-11-22 
Place (in Japanese) (See Japanese page) 
Place (in English) Matsue Terrsa 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Adaptive Antenna, Equalization, Interference Canceller, MIMO, Wireless Communication Systems, etc. 
Paper Information
Registration To RCS 
Conference Code 2013-11-RCS-AP 
Language English 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Stochastic Resonance and The Secrecy Capacity of Wiretap Channels 
Sub Title (in English)  
Keyword(1) Information Security  
Keyword(2) Physical-Layer Security  
Keyword(3) Low SNR Communications  
Keyword(4) Stochastic Resonance  
Keyword(5) Information Theory  
Keyword(6) Wiretap Channel  
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Keyword(8)  
1st Author's Name Oussama Souihli  
1st Author's Affiliation KDDI R&D Laboratories (KDDI R&D Labs)
2nd Author's Name Tomoaki Ohtsuki  
2nd Author's Affiliation Keio University (Keio Univ.)
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Speaker Author-1 
Date Time 2013-11-22 14:55:00 
Presentation Time 25 minutes 
Registration for RCS 
Paper # RCS2013-204 
Volume (vol) vol.113 
Number (no) no.301 
Page pp.177-182 
#Pages
Date of Issue 2013-11-13 (RCS) 


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