SHIKATA Junji

Affiliation

Faculty of Environment and Information Sciences, Division of Social Environment and Information

Job Title

Professor

Research Fields, Keywords

Computational Number Theory, Information Security, Information Theory, Theoretical Computer Science, Cryptography

Mail Address

E-mail address



The Best Research Achievement in Research Career 【 display / non-display

  • 【Published Thesis】 Security Formalizations and Their Relationships for Encryption and Key Agreement in Information Theoretic Cryptography  2018.01

    【Published Thesis】 Lower Bounds on Lattice Enumeration with Extreme Pruning  2018.08

    【Published Thesis】 Security Notions for Unconditionally Secure Signature Schemes  2002

The Best Research Achievement in the last 5 years 【 display / non-display

  • 【Published Thesis】 M. Iwamoto, K. Ohta, and J. Shikata, "Security Formalizations and Their Relationships for Encryption and Key Agreement in Information Theoretic Cryptography", IEEE Transactions on Information Theory, Vol. 64, No. 1, pp. 654-685, January 2018  2018.01

    【Published Thesis】 Yoshinori Aono, Phong Q. Nguyen, Takenobu Seito, and Junji Shikata, "Lower Bounds on Lattice Enumeration with Extreme Pruning", Advances in Cryptology - CRYPTO 2018, LNCS 10992, pp. 608-637, Springer, August 2018  2018.08

    【Published Thesis】 Singo Sato and Junji Shikata, "Lattice-based Signcryption without Random Oracles", Proceedings of International Conference on Post-Quantum Cryptography, PQCrypto 2018: Post-Quantum Cryptography, Fort Lauderdale, FL, USA, April 9-11, 2018. LNCS 10786, pp.331-351, Springer, April 2018  2018.04

    【Published Thesis】 Y. Watanabe and J. Shikata, "Timed-Release Computational Secret Sharing Scheme and Threshold Encryption", Designs, Codes and Cryptography, Volume 86, Number 1, pp. 17-54, January 2018  2018.01

    【Published Thesis】 Junji Shikata, Yohei Watanabe, "Identity-based Encryption with Hierarchical Key-insulation in the Standard Model", Designs, Codes and Cryptography, Volume 87, Issue 5, pp. 1005-1033, Springer, May 2019  2019.05

Education 【 display / non-display

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    2000

    Osaka University   Doctor Course   Completed

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    1997

    Kyoto University   Master Course   Completed

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    1994

    Kyoto University   Graduated

Degree 【 display / non-display

  • Doctor of Science - Osaka University

Campus Career 【 display / non-display

  • 2016.4
     
     

    Duty   Yokohama National UniversityFaculty of Environment and Information Sciences   Division of Social Environment and Information   Professor  

  • 2007.4
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    2016.3

    Duty   Yokohama National UniversityFaculty of Environment and Information Sciences   Division of Social Environment and Information   Associate Professor  

  • 2005.4
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    2007.3

    Duty   Yokohama National UniversityResearch Institute of Environment and Information Sciences   Division of Social Environment and Information   Associate Professor  

  • 2002.4
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    2005.3

    Duty   Yokohama National UniversityResearch Institute of Environment and Information Sciences   Division of Social Environment and Information   Lecturer  

  • 2021.4
     
     

    Concurrently   Yokohama National UniversityFaculty of Environment and Information Sciences   Dean  

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External Career 【 display / non-display

  • 2000.4
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    2002.3

    University of Tokyo   Institute of Industrial Science   Researcher  

  • 2008.3
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    2009.2

    Swiss Federal Institute of Technology (ETH)   Department of Computer Science   Visiting Researcher  

  • 2017.4
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    2019.3

     

  • 2014.4
     
     

     

Academic Society Affiliations 【 display / non-display

  • 2004
     
     
     

    情報処理学会

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    IEEE

Research Areas 【 display / non-display

  • Informatics / Information security  / Cryptology

  • Informatics / Theory of informatics  / Cryptology

  • Natural Science / Applied mathematics and statistics

  • Natural Science / Basic mathematics

 

Research Career 【 display / non-display

  • Public-key Cryptography

    Project Year:

  • Information-Theoretic Cryptography

    Grant-in-Aid for Scientific Research  

    Project Year:

  • Analysis of Mathematical Algorithms

    Project Year:

Papers 【 display / non-display

  • Multi-Designated Receiver Authentication-Codes with Information-Theoretic Security

    Takenobu Seito, Junji Shikata, Yohei Watanabe

    56th Annual Conference on Information Sciences and Systems (CISS 2022), IEEE Xplore   2022.3  [Reviewed]

    DOI

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    Language:English   Publishing type:Research paper (international conference proceedings)   Single Work  

  • IoT 機器のための遠隔安全制御システム

    竹内健, 渡邊洋平, 矢内直人, 竹久達也, 四方順司, 中尾康二

    信学技報   IEICE-121 ( 410 )   87 - 92   2022.3

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    Language:Japanese   Publishing type:Research paper (research society, symposium materials, etc.)   Single Work  

  • ガウス盗聴通信路に適したBICMのビットラベリング最適化に関する検討

    松峯利樹, 落合秀樹, 四方順司

    信学技報   vol. 121 ( no. 430 )   95 - 100   2022.3

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    Language:Japanese   Publishing type:Research paper (research society, symposium materials, etc.)   Single Work  

  • 情報銀行のセキュリティに関する一考察

    清藤武暢, 四方順司

    研究報告コンピュータセキュリティ(CSEC)   2022-CSEC-96 ( No.29 )   1 - 7   2022.3

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Single Work  

  • 格子に基づくIDベース対話集約署名

    佐藤慎悟, 四方順司

    研究報告コンピュータセキュリティ(CSEC)   2022-CSEC-96 ( No. 21 )   1 - 8   2022.3

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    Language:Japanese   Publishing type:Research paper (research society, symposium materials, etc.)   Single Work  

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Review Papers 【 display / non-display

  • Trend Survey on Post-Quantum Cryptography and its Standardization

    Seito Takenobu, Shikata Junji

    SYSTEMS, CONTROL AND INFORMATION   65 ( 2 )   60 - 66   2021.2  [Reviewed]  [Invited]

    DOI CiNii Research

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    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (scientific journal)   Publisher:THE INSTITUTE OF SYSTEMS, CONTROL AND INFORMATION ENGINEERS   Joint Work  

  • 量子コンピュータに耐性のある暗号技術と標準化の動向

    清藤武暢, 四方順司

    システム制御情報学会誌, システム/制御/情報   65 ( 2 )   60 - 66   2021.2  [Reviewed]  [Invited]

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    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (scientific journal)   Publisher:システム制御情報学会   Joint Work  

  • 量子コンピュータに耐性のある暗号技術の標準化動向:米国政府標準暗号について

    四方順司

    日本銀行金融研究所ディスカッション・ペーパー・シリーズ   ( 2019-J-4 )   2019.3

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    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (bulletin of university, research institution)   Publisher:日本銀行金融研究所   Single Work  

  • 量子コンピュータの脅威を考慮した高機能暗号:格子問題に基づく準同型暗号とその応用

    四方順司

    金融研究   38 ( 1 )   73 - 96   2019.1  [Reviewed]  [Invited]

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    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (scientific journal)   Publisher:日本銀行金融研究所   Single Work  

  • 量子コンピュータが共通鍵暗号の安全性に与える影響

    清藤武暢, 四方順司

    金融研究   38 ( 1 )   46 - 72   2019.1  [Reviewed]  [Invited]

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    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (scientific journal)   Publisher:日本銀行金融研究所   Joint Work  

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Awards 【 display / non-display

  • 第21回コンピュータセキュリティシンポジウム(CSS2018)優秀論文賞

    2018.10   情報処理学会   CBDH仮定に基づく効率的な閾値公開鍵暗号

    Individual or group name of awards:海老名将宏, 渡邉洋平, 四方順司

  • 電子情報通信学会ISEC研究会活動貢献感謝状

    2018.9   電子情報通信学会  

    Individual or group name of awards:青野良範, 清藤武暢, 四方順司

  • 情報処理学会CSEC優秀研究賞

    2017.10   情報処理学会CSEC研究会  

    Individual or group name of awards:清藤武暢, 青野良範, 四方順司

  • 日本学術振興会 平成27年度科学研究費審査委員表彰

    2015.10   日本学術振興会  

    Individual or group name of awards:四方順司

  • The 9th International Workshop on Securty (IWSEC2014), The Best Poster Award

    2014.8   The 9th International Workshop on Securty (IWSEC2014)  

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Grant-in-Aid for Scientific Research 【 display / non-display

  • 十分統計量に基づくシミュレーションベース安全性の深化

    2021.4 - 2025.3

    科学研究費補助金  Grant-in-Aid for Scientific Research(B)

    Investigator(s):岩本貢

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    Authorship:Coinvestigator(s)  Grant type:Competitive

  • 情報理論的暗号理論における統一的パラダイムの深化、発展とその応用

    2018.4 - 2022.3

    科学研究費補助金  Grant-in-Aid for Scientific Research(B)

    Investigator(s):四方順司

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    Authorship:Principal investigator  Grant type:Competitive

  • 推測秘匿性に基づく情報理論的暗号理論の新展開

    2017.4 - 2022.3

    科学研究費補助金  Grant-in-Aid for Scientific Research(B)

    Investigator(s):岩本貢

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    Authorship:Coinvestigator(s)  Grant type:Competitive

  • 情報理論的暗号理論における統一的パラダイムの構築とその応用

    2015.4 - 2018.3

    科学研究費補助金  Grant-in-Aid for Scientific Research(B)

    Investigator(s):四方順司

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    Authorship:Principal investigator  Grant type:Competitive

Other external funds procured 【 display / non-display

  • 電波資源拡大のための研究開発:安全な無線通信サービスのための新世代暗号技術に関する研究開発・課題イ

    2021.8 - 2025.3

    Ministry of Public Management, Home Affairs, Posts and Telecommunications  総務省委託研究

    Investigator(s):四方順司

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    Authorship:Principal investigator 

  • 情報セキュリティ関連分野に関する学術研究動向

    2021.4 - 2022.3

    日本学術振興会 学術研究動向等に関する調査研究

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    Authorship:Principal investigator 

  • 電波資源拡大のための研究開発:電波の有効利用のためのIoTマルウェア無害化/無機能化技術等に関する研究開発, 課題イ②(a)

    2020.8 - 2023.3

    Ministry of Public Management, Home Affairs, Posts and Telecommunications  総務省委託研究

    Investigator(s):四方順司

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    Authorship:Principal investigator 

  • 情報セキュリティ関連分野に関する学術研究動向

    2020.4 - 2021.3

    日本学術振興会受託研究:学術研究動向等に関する調査研究

    Investigator(s):四方順司

  • 電波資源拡大のための研究開発:IoTワイヤレスセキュリティ通信における周波数有効利用技術に関する研究開発

    2017.8 - 2020.3

    Ministry of Public Management, Home Affairs, Posts and Telecommunications  総務省委託研究

    Investigator(s):四方順司

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Presentations 【 display / non-display

  • 格子に基づくIDベース対話集約署名

    佐藤慎悟, 四方順司

    CSEC/DPS合同研究会  2022.3  情報処理学会

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    Event date: 2022.3

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン   Country:Japan  

  • ガウス盗聴通信路に適したBICMのビットラベリング最適化に関する検討

    松峯利樹, 落合秀樹, 四方順司

    ISEC・IT・RCC・WBS合同研究会  2022.3  電子情報通信学会

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    Event date: 2022.3

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン   Country:Japan  

  • 情報銀行のセキュリティに関する一考察

    清藤武暢, 四方順司

    CSEC/DPS合同研究会  2022.3  情報処理学会

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    Event date: 2022.3

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン   Country:Japan  

  • Multi-Designated Receiver Authentication-Codes with Information-Theoretic Security

    Takenobu Seito, Junji Shikata, Yohei Watanabe

    The 56th Annual Conference on Information Sciences and Systems (CISS 2022)  2022.3 

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    Event date: 2022.3

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Online   Country:United States  

  • IoT 機器のための遠隔安全制御システム

    竹内健, 渡邊洋平, 矢内直人, 竹久達也, 四方順司, 中尾康二

    ICSS/IPSJ-SPT合同研究会  2022.3  電子情報通信学会

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    Event date: 2022.3

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン   Country:Japan  

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Charge of on-campus class subject 【 display / non-display

  • 2022   Laboratory for Electrical and Computer Engineering

    College of Engineering Science

  • 2022   Laboratory for Electrical and Computer Engineering

    College of Engineering Science

  • 2022   Exercises for Topics in Mathematical Algorithms

    Graduate School of Environment and Information Sciences

  • 2022   Mathematical Algorithm

    Graduate School of Environment and Information Sciences

  • 2022   Mathematical Algorithm

    Interfaculty Graduate School of Innovative and Practical Studies

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Charge of off-campus class subject 【 display / non-display

  • 暗号理論特論

 

Committee Memberships 【 display / non-display

  • CRYPTREC暗号技術評価委員会

    2019.5  委員

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    Committee type:Government 

  • CRYPTREC暗号技術調査WG(高機能暗号)

    2021.7  主査

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    Committee type:Government 

  • 日本学術振興会 学術システム研究センター

    2020.4  専門研究員

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    Committee type:Government 

Social Contribution(Extension lecture) 【 display / non-display

  • 令和2年度免許状更新講習

    Role(s): Lecturer

    オンライン  2020.12

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    Audience: Teachers

    Type:Certification seminar

  • 横浜市仏向小学校CO-LABO(コラボ)教室授業

    Role(s): Lecturer

    横浜市教育委員会  2020.1

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    Audience: Schoolchildren

    Type:Visiting lecture

  • 2019河合塾文化講演会シリーズ

    Role(s): Lecturer

    河合塾  京都  2019.9

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    Audience: High school students, General public

    Type:Lecture

  • 一般社団法人サイバー犯罪捜査・調査ナレッジフォーラム設立記念特別セミナー

    Role(s): Panelist

    東京  2018.7

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    Audience: Researchers, General public, Company, Media

    Type:Seminar, workshop