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Study on optical fiber communication of the physical cipher beyond the Shannon limit

Research Project

Project/Area Number 15K13991
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Communication/Network engineering
Research InstitutionTamagawa University

Principal Investigator

Futami Fumio  玉川大学, 量子情報科学研究所, 教授 (20417695)

Co-Investigator(Kenkyū-buntansha) 相馬 正宜  玉川大学, 工学部, 教授 (70384716)
Project Period (FY) 2015-04-01 – 2017-03-31
Project Status Completed (Fiscal Year 2016)
Budget Amount *help
¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2016: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords暗号のシャノン限界 / 物理暗号 / 光ファイバ通信 / シャノン限界 / 暗号学シャノン限界超越 / 一般化物理暗号
Outline of Final Research Achievements

Today, the data traffic including the sensitive data is rapidly increasing. An encryption key is required for secure communication and an efficient use of the key is an issue for huge amount of data. The physical cipher has a possibility to realize an efficient use of the key which provides the security beyond the Shannon limit of the cryptography. For realizing such physical cipher, we have proposed a novel scheme employing phase modulation in the frequency domain. An experimental demonstration of encryption and decryption using shared keys have been successfully conducted using 10-Gb/s optical signal at the wavelength of 1.5 micron. In addition, we have successfully applied the novel scheme to an optical fiber transmission over 120 km. This result will give a great advance to realize a physical cipher beyond the Shannon limit of the cryptography.

Report

(3 results)
  • 2016 Annual Research Report   Final Research Report ( PDF )
  • 2015 Research-status Report
  • Research Products

    (6 results)

All 2017 2016 2015

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (4 results)

  • [Journal Article] On the Relation between Holevo’s Commutation Operator and Modular Operator2016

    • Author(s)
      Masaki Sohma
    • Journal Title

      Tamagawa University Quantum ICT Research Institute Bulletin

      Volume: 6 Pages: 25-27

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Cut-off Rate for ASK signal states2015

    • Author(s)
      Masaki Sohma
    • Journal Title

      Tamagawa University Quantum ICT Research Institute Bulletin

      Volume: 5 Pages: 29-31

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Y-00光通信量子暗号の研究開発 シャノン限界を超える物理暗号通信に向けて2017

    • Author(s)
      二見史生
    • Organizer
      第15回量子情報ミニワークショップ
    • Place of Presentation
      開春楼(静岡県浜松市)
    • Year and Date
      2017-01-23
    • Related Report
      2016 Annual Research Report
  • [Presentation] Introduction to Quantum IO Monad2017

    • Author(s)
      相馬正宜
    • Organizer
      第15回量子情報ミニワークショップ
    • Place of Presentation
      開春楼(静岡県浜松市)
    • Year and Date
      2017-01-22
    • Related Report
      2016 Annual Research Report
  • [Presentation] Y-00光通信量子暗号とその応用 シャノン限界を超える物理暗号通信に向けて2016

    • Author(s)
      二見史生
    • Organizer
      第14回量子情報ミニワークショップ
    • Place of Presentation
      木もれび(滋賀県大津市)
    • Year and Date
      2016-01-10
    • Related Report
      2015 Research-status Report
  • [Presentation] Cut-off Rate for Quantum Gaussian Channels2016

    • Author(s)
      相馬正宜
    • Organizer
      第14回量子情報ミニワークショップ
    • Place of Presentation
      木もれび(滋賀県大津市)
    • Year and Date
      2016-01-09
    • Related Report
      2015 Research-status Report

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Published: 2015-04-16   Modified: 2018-03-22  

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