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Systematic Evaluation on Security and Privacy of Crypto-Virtual Currency

Research Project

Project/Area Number 18H03240
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 60070:Information security-related
Research InstitutionKyushu University

Principal Investigator

櫻井 幸一  九州大学, システム情報科学研究院, 教授 (60264066)

Co-Investigator(Kenkyū-buntansha) SU Chunhua  会津大学, コンピュータ理工学部, 上級准教授 (40716966)
穴田 啓晃  長崎県立大学, 情報システム学部, 教授 (40727202)
馮 尭楷  九州大学, システム情報科学研究院, 助教 (60363389)
Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2020: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2019: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2018: ¥7,410,000 (Direct Cost: ¥5,700,000、Indirect Cost: ¥1,710,000)
Keywordsブロックチェーン / 暗号仮想通貨 / プライバシー / デジタル通貨 / 耐量子暗号 / 暗号ハッシュ関数 / 仮想通貨 / 暗号資産 / セキュリティ / 認証 / 分散計算 / 暗号プロトコル / 分散データベース / 仮想通過 / データベース / ビットコイン / 暗号
Outline of Annual Research Achievements

本研究では、ビットコインやその亜種、ブロックチェーンなど暗号アルゴズムを利用した仮想通貨や契約サービスシステムの寿命を、アルゴリズムの危殆化を基準に評価した。また、匿名性と個人情報の関連結性も、分散計算プロトコルの解析に基づき、理論的に評価した。さらに、基盤アルゴリズムやプトロコルの修正による、安全性や匿名性の強化も研究した。
特に最も普及し注目されているビットコインの暗号理論に基づく計算機科学的な寿命評価が最重要課題であり、さらに挑戦的課題として、その延命手段として、耐量子仮想通貨の可能性も研究した。
(1) 当初の計画通りに,研究課題を推し進めた. 特に最終年度あることを意識し,今後の課題も整理した.
(2)ハッシュ関数を使ったマイニング時間の小分散化は,より効果的な構成法も検討した.
(3)国内の研究会やシンポジウムで積極的に成果を発表した。国際会議へはもonlineではあるが積極的参加し,この分野の研究者とのより一層の連携を図った.
(4) 最新研究の主題が仮想通貨からデジタル通貨、さらにはNFT(Non-Fungilbe Token)へと移りつつあることを認識し、今後の課題を整理した。

Research Progress Status

令和2年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

令和2年度が最終年度であるため、記入しない。

Report

(3 results)
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • 2018 Annual Research Report

Research Products

(36 results)

All 2022 2021 2020 2019 2018 Other

All Int'l Joint Research (7 results) Journal Article (12 results) (of which Int'l Joint Research: 12 results,  Peer Reviewed: 12 results,  Open Access: 3 results) Presentation (11 results) (of which Int'l Joint Research: 2 results,  Invited: 2 results) Book (2 results) Remarks (4 results)

  • [Int'l Joint Research] Calgary University(カナダ)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] インド統計研究所・コルカタ/マイクロソフロバンガロール/IITデリー校(インド)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] 天津大学/北京交通大学/南京航空宇宙大学(中国)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] ノルウエー科学技術大学(ノルウェー)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] デンマーク工科大学(デンマーク)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] インド統計研究所/マイクロソフトバンガロール/IITデリー(インド)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] Technical University of Denmark(デンマーク)

    • Related Report
      2018 Annual Research Report
  • [Journal Article] A Distributed Ledger Management Mechanism for Storing and Selling Private Data2021

    • Author(s)
      Dutta Sabyasachi、Paul Arinjita、Ozaki Rocki H.、Ranzan C. Pandu、Sakurai Kouichi
    • Journal Title

      Proc. IEEE Conference on Dependable and Secure Computing, DSC 2021

      Volume: 1 Pages: 1-8

    • DOI

      10.1109/dsc49826.2021.9346258

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Design and Evaluation of Escrow Scheme on Autonomous Vehicles for Overtaking Service with Ethereum2021

    • Author(s)
      Zeng Siqi、Kaneko Kosuke、Ke Yan、Tan Haowen、Sakurai Kouichi
    • Journal Title

      Proc. Ninth International Symposium on Computing and Networking, CANDAR 2021 - Workshops,

      Volume: 1 Pages: 473-477

    • DOI

      10.1109/candarw53999.2021.00088

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Am I eclipsed? A smart detector of eclipse attacks for Ethereum2020

    • Author(s)
      Xu Guangquan、Guo Bingjiang、Su Chunhua、Zheng Xi、Liang Kaitai、Wong Duncan S.、Wang Hao
    • Journal Title

      Computers & Security

      Volume: 88 Pages: 101604-101604

    • DOI

      10.1016/j.cose.2019.101604

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A privacy preserving two-factor authentication protocol for the Bitcoin SPV nodes2020

    • Author(s)
      Lu Zhou, Chunpeng Ge, and Chunhua Su
    • Journal Title

      Science China Information Sciences volume

      Volume: 63

    • DOI

      10.1007/s11432-019-9922-x

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] ContractWard: Automated Vulnerability Detection Models for Ethereum Smart Contracts2020

    • Author(s)
      Wang Wei、Song Jingjing、Xu Guangquan、Li Yidong、Wang Hao、Su Chunhua
    • Journal Title

      IEEE Transactions on Network Science and Engineering (Early Access )

      Volume: x Pages: 1-1

    • DOI

      10.1109/tnse.2020.2968505

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Reliable Decentralized Oracle with Mechanisms for Verification and Disputation2019

    • Author(s)
      Ma Limao、Kaneko Kosuke、Sharma Subodh、Sakurai Kouichi
    • Journal Title

      CANDAR Workshops 2019

      Volume: xxx Pages: 346-352

    • DOI

      10.1109/candarw.2019.00067

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Y-DWMS: A Digital Watermark Management System Based on Smart Contracts2019

    • Author(s)
      Zhao Bo、Fang Liming、Zhang Hanyi、Ge Chunpeng、Meng Weizhi、Liu Liang、Su Chunhua
    • Journal Title

      Sensors

      Volume: 19 Pages: 3091-3091

    • DOI

      10.3390/s19143091

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] RSA public keys with inside structure: Proofs of key generation and identities for web-of-trust2019

    • Author(s)
      Anada Hiroaki、Yasuda Takanori、Kawamoto Junpei、Weng Jian、Sakurai Kouichi
    • Journal Title

      Journal of Information Security and Applications

      Volume: 45 Pages: 10-19

    • DOI

      10.1016/j.jisa.2018.12.006

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Simulation of Secure Volunteer Computing by Using Blockchain2019

    • Author(s)
      Shota Johjima、Kosuke Kaneko、Sharma Subodh、Kouichi Sakurai
    • Journal Title

      AINA 2019, Advances in Intelligent Systems and Computing

      Volume: 926 Pages: 883-894

    • DOI

      10.1007/978-3-030-15032-7_74

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Analysis of Variance of Graph-Clique Mining for Scalable Proof of Work2019

    • Author(s)
      Anada Hiroaki、Matsushima Tomohiro、Su Chunhua、Meng Weizhi、Kawamoto Junpei、Bag Samiran、Sakurai Kouichi
    • Journal Title

      Information Security and Cryptology - 14th International Conference, Inscrypt 2018, Revised Selected Papers. Lecture Notes in Computer Science

      Volume: 11449 Pages: 101-114

    • DOI

      10.1007/978-3-030-14234-6_6

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Suppressing Chain Size of Blockchain-Based Information Sharing for Swarm Robotic Systems2018

    • Author(s)
      Nishida Yuki、Kaneko Kosuke、Sharma Subodh、Sakurai Kouichi
    • Journal Title

      Sixth International Symposium on Computing and Networking, CANDAR Workshops 2018,

      Volume: 1 Pages: 524-528

    • DOI

      10.1109/candarw.2018.00102

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Proof of Disease: A Blockchain Consensus Protocol for Accurate Medical Decisions and Reducing the Disease Burden2018

    • Author(s)
      Talukder Asoke K、Chaitanya Manish、Arnold David、Sakurai Kouichi
    • Journal Title

      IEEE SmartWorld/SCALCOM/UIC/ATC/CBDCom/IOP/SCI 2018,

      Volume: 1 Pages: 257-262

    • DOI

      10.1109/smartworld.2018.00079

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] 分散型ID(DID)/検証可能属性証明(VC)技術を利用した自己主権型アイデンティティ情報利活用基盤(SSIUF)に関する考察2022

    • Author(s)
      才所敏明, 辻井重男, 櫻井幸一
    • Organizer
      暗号と情報セキュリティシンポジウム
    • Related Report
      2020 Annual Research Report
  • [Presentation] 自己主権型アイデンティティ情報利活用基盤に関する考察2021

    • Author(s)
      所敏明, 辻井重男, 櫻井幸一
    • Organizer
      コンピュータセキュリティシンポジウム
    • Related Report
      2020 Annual Research Report
  • [Presentation] ハッシュマイニングにおけるブロック到着時間の小分散化2020

    • Author(s)
      ○穴田 啓晃, 櫻井 幸一
    • Organizer
      2020年暗号と情報セキュリティシンポジウム
    • Related Report
      2019 Annual Research Report
  • [Presentation] DAG技術ベースの暗号資産の匿名性に関する考察2020

    • Author(s)
      ○才所敏明, 辻井重男, 櫻井幸一
    • Organizer
      2020年暗号と情報セキュリティシンポジウム
    • Related Report
      2019 Annual Research Report
  • [Presentation] 匿名暗号資産(Monero/Zcash/Grin)ブロックチェーンの匿名性に関する考察2019

    • Author(s)
      ○才所 敏明, 辻井 重男, 櫻井 幸一
    • Organizer
      コンピュータセキュリティシンポジウム 2019
    • Related Report
      2019 Annual Research Report
  • [Presentation] 第9回バル=イラン大学冬季暗号学スクール参加報告2019

    • Author(s)
      ○穴田 啓晃
    • Organizer
      電子情報通信学会 暗号と情報セキュリティ 研究会 信学技報, vol. 119, no. 140, ISEC2019-55, pp. 357-361, 2019年7月.
    • Related Report
      2019 Annual Research Report
  • [Presentation] E-voting scheme after Blockchain: A challenge of achieving "Receipt-freeness"2019

    • Author(s)
      Kouichi SAKURAI
    • Organizer
      The 2nd International Workshop on Blockchain and its Applications (Blockchain 2019) 広州
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Security of Electronic Voting Schemes after Blockchain2019

    • Author(s)
      Kouichi SAKURAI
    • Organizer
      13th International Conference on Network and System Security (NSS2019) 札幌
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] スマートコントラクトにおける信頼性ある分散型オラクル手法の提案2019

    • Author(s)
      馬 立茂 , 金子 晃介 , 櫻井幸一
    • Organizer
      火の国シンポジウム2019
    • Related Report
      2018 Annual Research Report
  • [Presentation] 仮想通貨の匿名性の現状と課題2019

    • Author(s)
      才所敏明 辻井重男,櫻井幸一
    • Organizer
      暗号と情報セキュリティシンポジウム(SCIS)
    • Related Report
      2018 Annual Research Report
  • [Presentation] 暗号仮想通貨における匿名化技術の現状と展望2019

    • Author(s)
      才所敏明 辻井重男,櫻井幸一
    • Organizer
      IPSJ 全国大会(福岡大学)
    • Related Report
      2018 Annual Research Report
  • [Book] BCC '19: Proceedings of the Third ACM Workshop on Blockchains, Cryptocurrencies and Contracts2019

    • Author(s)
      Satyanarayana V Lokam , Sushmita Ruj, Kouichi Sakurai
    • Total Pages
      25
    • Publisher
      ACM Special Interest Group on Security, Audit and Control
    • ISBN
      9781450367851
    • Related Report
      2019 Annual Research Report
  • [Book] Proceedings of the 2nd ACM Workshop on Blockchains, Cryptocurrencies, and Contracts2018

    • Author(s)
      Satya LOKAM, Sushmita RUJ, Kouichi SAKURAI
    • Total Pages
      63
    • Publisher
      ACM
    • ISBN
      9781450357586
    • Related Report
      2018 Annual Research Report
  • [Remarks] 九州大学 研究者情報

    • URL

      https://hyoka.ofc.kyushu-u.ac.jp/search/details/K000220/

    • Related Report
      2020 Annual Research Report
  • [Remarks] 九州大学-研究者情報: [櫻井 幸一

    • URL

      https://hyoka.ofc.kyushu-u.ac.jp/search/details/K000220

    • Related Report
      2019 Annual Research Report
  • [Remarks] 九州大学-研究者情報: 馮 尭鍇(フォン ヤオカイ、Feng Yaokai)

    • URL

      https://hyoka.ofc.kyushu-u.ac.jp/search/details/K002276/index.html

    • Related Report
      2019 Annual Research Report
  • [Remarks] 九州大学研究者情報

    • URL

      http://hyoka.ofc.kyushu-u.ac.jp/search/details/K000220/

    • Related Report
      2018 Annual Research Report

URL: 

Published: 2018-04-23   Modified: 2022-12-28  

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