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Secure Distributed Hypothesis Testing for Biometrics

Research Project

Project/Area Number 20H02144
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 21020:Communication and network engineering-related
Research InstitutionTokyo University of Agriculture and Technology

Principal Investigator

Watanabe Shun  東京農工大学, 工学(系)研究科(研究院), 准教授 (70546910)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥16,510,000 (Direct Cost: ¥12,700,000、Indirect Cost: ¥3,810,000)
Fiscal Year 2023: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2022: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2021: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2020: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Keywords情報理論 / 暗号理論 / 計算量理論 / セキュリティ / 仮説検定 / 認証 / ゼロ知識証明 / 同定符号 / ビットセキュリティ / 分散検定 / 生体認証
Outline of Research at the Start

IoT技術の発展に伴い,システムへの不正アクセスを防ぐための認証技術はますます重要になってきており,指紋認証や虹彩認証などの生体認証の利用は増加していくと考えられる.しかしながら,生体認証をリモートで行う際に,生体情報をそのまま回線で送信してしまうと,通信途中で生体情報が盗聴されてしまう危険性がある.生体情報は一度漏洩してしまうとパスワードのように変更ができないため,極めて深刻な問題となる.従って,情報の漏洩を抑えた認証方式の提案が望まれる.本研究では,生体認証をネットワーク情報理論における分散検定として捉え,不正検出のための分散検定理論を構築する.

Outline of Final Research Achievements

We have conducted various research related to the theory of security and distributed hypothesis testing. We can summarize the research outcomes as follows: (1) In the problem of distributed hypothesis testing, we have proved that the previously known best testing scheme is suboptimal; (2) In the problem of identification over noisy channel, we have proved the capacity without the assumption of strong converse property, which has been an open problem for a while; (3) We have proved that the family of reversible Markov kernel constitute an exponential family, and also demonstrated certain properties induced from that fact; (4) In the analysis of crypto systems, we often evaluate the security level of certain systems using the concept of bit-security. By using tools from information theory, we have introduced a novel definition of bit-security that has an operational meaning; (5) We have written a textbook that systematically summarizes the information-theoretic cryptography.

Academic Significance and Societal Importance of the Research Achievements

IoT技術の発展に伴い,システムへの不正アクセスを防ぐための認証技術はますます重要になってきている.そのようなシステムの安全性を保証するためにも、なぜ安全性が保証されるのか、どうすれば効率を高めることができるのか、といったことの原理をしっかりと理解しなければならない。本研究で得られた成果はIoT技術の理論基盤を築く際の指針となり得るものであると考える。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • Research Products

    (11 results)

All 2023 2022 2021 2020 Other

All Int'l Joint Research (1 results) Journal Article (4 results) (of which Peer Reviewed: 4 results,  Open Access: 3 results) Presentation (5 results) (of which Int'l Joint Research: 4 results) Book (1 results)

  • [Int'l Joint Research] Indian Institute of Science, Bangalore(インド)

    • Related Report
      2023 Annual Research Report
  • [Journal Article] Unified View for Notions of Bit Security2023

    • Author(s)
      Watanabe Shun、Yasunaga Kenji
    • Journal Title

      ASIACRYPT2023 (Lecture Notes in Computer Science)

      Volume: 14443 Pages: 361-389

    • DOI

      10.1007/978-981-99-8736-8_12

    • ISBN
      9789819987351, 9789819987368
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Information geometry of Markov Kernels: a survey2023

    • Author(s)
      Wolfer Geoffrey、Watanabe Shun
    • Journal Title

      Frontiers in Physics

      Volume: 11 Pages: 1195562-1195562

    • DOI

      10.3389/fphy.2023.1195562

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Minimax Converse for Identification via Channels2022

    • Author(s)
      Watanabe Shun
    • Journal Title

      IEEE Transactions on Information Theory

      Volume: 68 Issue: 1 Pages: 25-34

    • DOI

      10.1109/tit.2021.3120033

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] A Classification of Functions in Multiterminal Distributed Computing2020

    • Author(s)
      Watanabe Shun
    • Journal Title

      IEEE Transactions on Information Theory

      Volume: 66 Issue: 10 Pages: 6169-6183

    • DOI

      10.1109/tit.2020.3002756

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Presentation] Tight Exponential Strong Converse for Source Coding with Encoded Side Information2023

    • Author(s)
      Takeuchi Daisuke, Watanabe Shun
    • Organizer
      IEEE 2023 International Symposium on Information Theory
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] On Sub-optimality of Random Binning for Distributed Hypothesis Testing2022

    • Author(s)
      Shun Watanabe
    • Organizer
      2022 IEEE International Symposium on Information Theory
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] A Numerical Study of Multi-letter Ahlswede-Han Scheme for Modulo-Sum Problem2022

    • Author(s)
      Takuto Kakishima and Shun Watanabe
    • Organizer
      International Symposium on Information Theory and It Applications
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Bit Security as Computational Cost for Winning Games with High Probability2021

    • Author(s)
      Shun Watanabe and Kenji Yasunaga
    • Organizer
      ASIACRYPT 2021: Advances in Cryptology, ASIACRYPT 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Minimax Converse for Identification via Channels2020

    • Author(s)
      Shun Watanabe
    • Organizer
      電子情報通信学会 情報理論研究会
    • Related Report
      2020 Annual Research Report
  • [Book] Information-theoretic Cryptography2023

    • Author(s)
      Himanshu Tyagi, Shun Watanabe
    • Total Pages
      517
    • Publisher
      Cambridge University Press
    • ISBN
      9781108484336
    • Related Report
      2023 Annual Research Report

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Published: 2020-04-28   Modified: 2025-01-30  

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