Presentation 2020-11-12
Multi-Channel Simultaneous Encryption in WDM Systems of PSK Y-00 Quantum Stream Cipher
Ken Tanizawa, Fumio Futami,
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Abstract(in Japanese) (See Japanese page)
Abstract(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 with a pre-shared seed key. Interception of the multilevel optical signal by an eavesdropper is disrupted by quantum (shot) noise in the cipher system. This paper reports multi-channel simultaneous encryption for a WDM system of phase-shift-keying Y-00 cipher. Experimental results show that four channels of 12-Gbaud QPSK data signals are simultaneously encrypted with common two-cascaded phase modulators and that the encrypted channels are successfully decrypted using a pre-shared key.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) Optical fiber communications / Security / Quantum noise / Digital coherent detection / Multilevel modulation
Paper # OCS2020-26
Date of Issue 2020-11-05 (OCS)

Conference Information
Committee OFT / ITE-BCT / OCS / IEE-CMN
Conference Date 2020/11/12(2days)
Place (in Japanese) (See Japanese page)
Place (in English) Online
Topics (in Japanese) (See Japanese page)
Topics (in English)
Chair Yuji Matsuura(Tohoku Univ.) / / Joji Maeda(Tokyo Univ. of Science) / Shun Morimura(CRIEPI)
Vice Chair / / / Kouji Hirata(Kansai Univ)
Secretary (NTT) / (Sumitomo Electric) / / Kouji Hirata(NTT)
Assistant Hajime Arao(Sumitomo Electric) / Yukihiro Goto(NTT) / / / Yuuichi Shinohara(TEPCO Power Grid) / Akihiro Tanaka(CRIEPI)

Paper Information
Registration To Technical Committee on Optical Fiber Technology / Technical Group on Broadcasting Technology / Technical Committee on Optical Communication Systems / Technical Meeting on Communications
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) Multi-Channel Simultaneous Encryption in WDM Systems of PSK Y-00 Quantum Stream Cipher
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
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.)
Date 2020-11-12
Paper # OCS2020-26
Volume (vol) vol.120
Number (no) OCS-229
Page pp.pp.15-20(OCS),
#Pages 6
Date of Issue 2020-11-05 (OCS)