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Paper Abstract and Keywords
Presentation 2020-10-09 13:25
[Invited Talk] Digital Coherent PSK Y-00 Quantum Stream Cipher for Secure Optical Fiber Communications
Ken Tanizawa, Fumio Futami (Tamagawa Univ.) OFT2020-32
Abstract (in Japanese) (See Japanese page) 
(in English) Tapping from an optical fiber link is a potential security risk in optical communication systems. Physical layer encryption utilizing physical property of light is a promising technique to make such tapping impossible. We focus on Y-00 quantum stream cipher utilizing multilevel optical modulation. Correct interception of the multilevel signal by an eavesdropper is disrupted by quantum (shot) noise in the cipher system. This paper reports phase-shift-keying Y-00 cipher realized by extremely high-order phase modulation and digital coherent technologies. Recent experimental demonstrations show that high security based on irreducible signal masking by shot noise and high transmission performances sufficient for a long-haul fiber link are simultaneously achieved.
Keyword (in Japanese) (See Japanese page) 
(in English) Optical fiber communications / Security / Quantum noise / Digital coherent detection / Multilevel modulation / / /  
Reference Info. IEICE Tech. Rep., vol. 120, no. 184, OFT2020-32, pp. 97-102, Oct. 2020.
Paper # OFT2020-32 
Date of Issue 2020-10-01 (OFT) 
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 OFT2020-32

Conference Information
Committee OFT  
Conference Date 2020-10-08 - 2020-10-09 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To OFT 
Conference Code 2020-10-OFT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Digital Coherent PSK Y-00 Quantum Stream Cipher for Secure Optical Fiber Communications 
Sub Title (in English)  
Keyword(1) Optical fiber communications  
Keyword(2) Security  
Keyword(3) Quantum noise  
Keyword(4) Digital coherent detection  
Keyword(5) Multilevel modulation  
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Keyword(7)  
Keyword(8)  
1st Author's Name Ken Tanizawa  
1st Author's Affiliation Tamagawa University (Tamagawa Univ.)
2nd Author's Name Fumio Futami  
2nd Author's Affiliation Tamagawa University (Tamagawa Univ.)
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Speaker Author-1 
Date Time 2020-10-09 13:25:00 
Presentation Time 25 minutes 
Registration for OFT 
Paper # OFT2020-32 
Volume (vol) vol.120 
Number (no) no.184 
Page pp.97-102 
#Pages 6 
Date of Issue 2020-10-01 (OFT) 

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