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Improvement of security and efficiency of identity-based encryption schemes resilient to key leakage

Research Project

Project/Area Number 17K12697
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Information security
Research InstitutionThe University of Electro-Communications (2017, 2019-2020)
National Institute of Information and Communications Technology (2018)

Principal Investigator

Watanabe Yohei  電気通信大学, 大学院情報理工学研究科, 助教 (40792263)

Project Period (FY) 2017-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2020: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2019: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2018: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2017: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywords暗号理論 / IDベース暗号 / 鍵漏洩耐性 / 鍵失効機能付きIDベース暗号 / 暗号・認証等
Outline of Final Research Achievements

Identity-based encryption (IBE) is public-key encryption that enables us to use arbitrary strings, such as e-mail addresses, for public keys. In this project, we aimed to improve IBE schemes with various secret-key leakage resilience properties so that simultaneously achieve strong security levels and high efficiency, and to realize a new model of secret-key leakage resilience for IBE. We finally obtained various results on revocable IBE and key-insulated IBE, and formalized a new model of secret-key leakage resilience.

Academic Significance and Societal Importance of the Research Achievements

通常のIBEにおいても高い安全性及び高い効率性を両立することは容易ではなく,近年やっと体系化されてきた研究指針である.しかし,機能付きIBEは通常のIBEとは枠組みから異なるため,IBEにおける指針がそのまま適用できる場合は少なく,学術的な工夫が必要であった.また情報漏洩インシデントは今もなお数多く起きており,そのような漏洩に耐性のある暗号技術の研究には社会的および学術的な意義があると考えられる.

Report

(5 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (32 results)

All 2021 2020 2019 2018 2017 Other

All Journal Article (20 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 10 results,  Open Access: 3 results,  Acknowledgement Compliant: 1 results) Presentation (9 results) (of which Int'l Joint Research: 3 results) Remarks (3 results)

  • [Journal Article] Adaptively Secure Revocable Hierarchical IBE from k-linear Assumption2021

    • Author(s)
      K. Emura, A. Takayasu, and Y. Watanabe
    • Journal Title

      Designs, Codes and Cryptography

      Volume: -

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Efficient revocable identity-based encryption with short public parameters2021

    • Author(s)
      K. Emura, J.H. Seo, and Y. Watanabe
    • Journal Title

      Theoretical Computer Science

      Volume: 863 Pages: 127-155

    • DOI

      10.1016/j.tcs.2021.02.024

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Revocable Identity-based Encryption with Bounded Decryption Key Exposure Resistance: Lattice-based Construction and More2021

    • Author(s)
      Atsushi Takayasu and Yohei Watanabe
    • Journal Title

      Theoretical Computer Science

      Volume: 849 Pages: 64-98

    • DOI

      10.1016/j.tcs.2020.10.010

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] AES鍵スケジュールからの固定ビット数漏洩を用いた鍵復元アルゴリズムの性能評価2021

    • Author(s)
      植村 友紀, 渡邉 洋平, 李 陽, 三浦 典之, 岩本 貢, 崎山 一男, 太田 和夫
    • Journal Title

      SCIS 2021予稿集

      Volume: -

    • Related Report
      2020 Annual Research Report
  • [Journal Article] A Key Recovery Algorithm Using Random Key Leakage from AES Key Schedule2020

    • Author(s)
      Tomoki Uemura, Yohei Watanabe, Yang Li, Noriyuki Miura, Mitsugu Iwamoto, Kazuo Sakiyama, and Kazuo Ohta
    • Journal Title

      IEICE Proceeding Series

      Volume: 65 Pages: 382-386

    • DOI

      10.34385/proc.65.C01-10

    • NAID

      230000012603

    • ISSN
      2188-5079
    • Year and Date
      2020-10-18
    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Key-Updatable Public-Key Encryption with Keyword Search (Or: How to Realize PEKS with Efficient Key Updates for IoT Environments)2020

    • Author(s)
      H. Anada, A. Kanaoka, N. Matsuzaki, and Y. Watanabe
    • Journal Title

      International Journal of Information Security

      Volume: 19 Issue: 1 Pages: 15-38

    • DOI

      10.1007/s10207-019-00441-2

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Identity-Based Encryption with Security against the KGC: A Formal Model and Its Instantiation from Lattices2019

    • Author(s)
      K. Emura, S. Katsumata, and Y. Watanabe
    • Journal Title

      Proceedings of ESORICS 2019

      Volume: LNCS 11736 Pages: 113-133

    • DOI

      10.1007/978-3-030-29962-0_6

    • ISBN
      9783030299613, 9783030299620
    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Identity-based Encryption with Hierarchical Key-insulation in the Standard Model2019

    • Author(s)
      Junji Shikata and Yohei Watanabe
    • Journal Title

      Designs, Codes and Cryptography

      Volume: 印刷中

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] より効率的で適応的に安全な鍵失効機能付きIDベース暗号の構成2019

    • Author(s)
      高安敦, 渡邉洋平, 江村恵太
    • Journal Title

      暗号と情報セキュリティシンポジウム2019 (SCIS 2019) 予稿集

      Volume: -

    • Related Report
      2018 Research-status Report
  • [Journal Article] 鍵生成センタに対して安全なIDベース暗号2019

    • Author(s)
      江村恵太, 勝又秀一, 渡邉洋平
    • Journal Title

      暗号と情報セキュリティシンポジウム2019 (SCIS 2019) 予稿集

      Volume: -

    • Related Report
      2018 Research-status Report
  • [Journal Article] 探索問題の困難性に基づく効率的なしきい値公開鍵暗号の構成2019

    • Author(s)
      海老名将宏, 渡邉洋平, 四方順司
    • Journal Title

      暗号と情報セキュリティシンポジウム2019 (SCIS 2019) 予稿集

      Volume: -

    • Related Report
      2018 Research-status Report
  • [Journal Article] Key-updatable Public-key Encryption with Keyword Search: Models and Generic Constructions2018

    • Author(s)
      Hiroaki Anada, Akira Kanaoka, Natsume Matsuzaki, and Yohei Watanabe
    • Journal Title

      Information Security and Privacy

      Volume: 10946 Pages: 341-359

    • DOI

      10.1007/978-3-319-93638-3_20

    • ISBN
      9783319936376, 9783319936383
    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] CBDH仮定に基づく効率的な閾値公開鍵暗号2018

    • Author(s)
      海老名将宏, 渡邉洋平, 四方順司
    • Journal Title

      コンピューターセキュリティシンポジウム2018 (CSS 2018) 予稿集

      Volume: - Pages: 746-753

    • NAID

      170000178615

    • Related Report
      2018 Research-status Report
  • [Journal Article] 鍵更新機能付き検索可能暗号:効率化に向けた一工夫2018

    • Author(s)
      松崎なつめ, 穴田啓晃, 金岡晃, 渡邉洋平
    • Journal Title

      コンピューターセキュリティシンポジウム2018 (CSS 2018) 予稿集

      Volume: - Pages: 814-821

    • NAID

      170000178624

    • Related Report
      2018 Research-status Report
  • [Journal Article] 鍵更新機能付き検索可能暗号の一般的構成2018

    • Author(s)
      松崎なつめ, 穴田啓晃, 金岡晃, 渡邉洋平
    • Journal Title

      暗号と情報セキュリティシンポジウム 2018 (SCIS 2018) 予稿集

      Volume: -

    • Related Report
      2017 Research-status Report
  • [Journal Article] Lattice-Based Revocable Identity-Based Encryption with Bounded Decryption Key Exposure Resistance2017

    • Author(s)
      Atsushi Takayasu and Yohei Watanabe
    • Journal Title

      Information Security and Privacy

      Volume: LNCS 10342 Pages: 184-204

    • DOI

      10.1007/978-3-319-60055-0_10

    • ISBN
      9783319600543, 9783319600550
    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] New Revocable IBE in Prime-Order Groups: Adaptively Secure, Decryption Key Exposure Resistant, and with Short Public Parameters2017

    • Author(s)
      Y. Watanabe, K. Emura, and J.H. Seo
    • Journal Title

      Topics in Cryptology - CT-RSA 2017

      Volume: 10159 Pages: 432-449

    • DOI

      10.1007/978-3-319-52153-4_25

    • ISBN
      9783319521527, 9783319521534
    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] 鍵更新機能付き検索可能暗号:鍵隔離モデルによる実現2017

    • Author(s)
      渡邉洋平, 穴田啓晃, 松崎なつめ
    • Journal Title

      コンピュータセキュリティシンポジウム 2017 (CSS 2017) 予稿集

      Volume: - Pages: 741-748

    • NAID

      170000176424

    • Related Report
      2017 Research-status Report
  • [Journal Article] 鍵更新機能付き検索可能暗号:公開鍵更新モデルによる実現2017

    • Author(s)
      松崎なつめ, 穴田啓晃, 渡邉洋平
    • Journal Title

      コンピュータセキュリティシンポジウム 2017 (CSS 2017) 予稿集

      Volume: - Pages: 734-740

    • NAID

      170000176423

    • Related Report
      2017 Research-status Report
  • [Journal Article] 鍵更新機能付き検索可能暗号の一提案 ~検索可能代理人再暗号化の適用について~2017

    • Author(s)
      松崎なつめ, 穴田啓晃, 渡邉洋平
    • Journal Title

      電子情報通信学会情報セキュリティ研究会, ISEC2017-5

      Volume: - Pages: 1-6

    • Related Report
      2017 Research-status Report
  • [Presentation] Identity-Based Encryption with Security against the KGC: A Formal Model and Its Instantiation from Lattices2019

    • Author(s)
      Keita Emura
    • Organizer
      ESORICS 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] より効率的で適応的に安全な鍵失効機能付きIDベース暗号の構成2019

    • Author(s)
      高安敦
    • Organizer
      暗号と情報セキュリティシンポジウム2019 (SCIS 2019) 予稿集
    • Related Report
      2018 Research-status Report
  • [Presentation] 鍵生成センタに対して安全なIDベース暗号2019

    • Author(s)
      江村恵太
    • Organizer
      暗号と情報セキュリティシンポジウム2019 (SCIS 2019) 予稿集
    • Related Report
      2018 Research-status Report
  • [Presentation] 探索問題の困難性に基づく効率的なしきい値公開鍵暗号の構成2019

    • Author(s)
      海老名将宏
    • Organizer
      暗号と情報セキュリティシンポジウム2019 (SCIS 2019) 予稿集
    • Related Report
      2018 Research-status Report
  • [Presentation] Key-updatable Public-key Encryption with Keyword Search: Models and Generic Constructions2018

    • Author(s)
      Yohei Watanabe
    • Organizer
      ACISP 2018
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] CBDH仮定に基づく効率的な閾値公開鍵暗号2018

    • Author(s)
      海老名将宏
    • Organizer
      コンピューターセキュリティシンポジウム2018 (CSS 2018) 予稿集
    • Related Report
      2018 Research-status Report
  • [Presentation] 鍵更新機能付き検索可能暗号:効率化に向けた一工夫2018

    • Author(s)
      松崎なつめ
    • Organizer
      コンピューターセキュリティシンポジウム2018 (CSS 2018) 予稿集
    • Related Report
      2018 Research-status Report
  • [Presentation] New Revocable IBE in Prime-Order Groups: Adaptively Secure, Decryption Key Exposure Resistant, and with Short Public Parameters2017

    • Author(s)
      Yohei Watanabe
    • Organizer
      RSA Conference 2017, Cryptographers' Track, CT-RSA 2017
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] 鍵更新機能付き検索可能暗号:鍵隔離モデルによる実現2017

    • Author(s)
      渡邉洋平
    • Organizer
      コンピュータセキュリティシンポジウム 2017 (CSS 2017)
    • Related Report
      2017 Research-status Report
  • [Remarks] 研究室ウェブサイト・研究成果ページ

    • URL

      https://iw-lab.jp/research/

    • Related Report
      2020 Annual Research Report
  • [Remarks] 研究代表者ウェブページ

    • URL

      http://ohta-lab.jp/users/y.watanabe/

    • Related Report
      2018 Research-status Report
  • [Remarks] 個人ホームページ

    • URL

      http://ohta-lab.jp/users/y.watanabe

    • Related Report
      2017 Research-status Report

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Published: 2017-04-28   Modified: 2022-01-27  

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