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Affiliation |
Organization for the Promotion of Education |
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Job Title |
Specially Appointed Assistant Professor |
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Research Fields, Keywords |
情報セキュリティ, 暗号理論, 情報理論 |
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YNU Research Center |
Research Center for Information and Physical Security |
TOMITA Toi
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The Best Research Achievement in Research Career 【 display / non-display 】
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【Published Thesis】 Post-Quantum Fujisaki-Okamoto Transformation for Anonymous Identity-Based Encryption(The 28th Annual International Conference on Information Security and Cryptology) 2025.11
【Published Thesis】 How to Apply Fujisaki-Okamoto Transformation to Registration-Based Encryption(Cryptology and Network Security (CANS 2024), Springer) 2024.09
【Published Thesis】 Efficient Identity-Based Encryption with Tight Adaptive Anonymity from RLWE(Post-Quantum Cryptography (PQCrypto 2024), Springer) 2024.06
The Best Research Achievement in the last 5 years 【 display / non-display 】
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【Published Thesis】 Post-Quantum Fujisaki-Okamoto Transformation for Anonymous Identity-Based Encryption(The 28th Annual International Conference on Information Security and Cryptology) 2025.11
【Published Thesis】 How to Apply Fujisaki-Okamoto Transformation to Registration-Based Encryption(Cryptology and Network Security (CANS 2024), Springer) 2024.09
【Published Thesis】 Lattice-Based Multi-entity Identification Protocols(7th International Conference, MobiSec 2023) 2024.06
【Published Thesis】 Efficient Identity-Based Encryption with Tight Adaptive Anonymity from RLWE(Post-Quantum Cryptography (PQCrypto 2024), Springer) 2024.06
【Published Thesis】 Direct computation of branching programs and its applications to more efficient lattice-based cryptography(Designs, Codes and Cryptography) 2022.09
YNU Research Center 【 display / non-display 】
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Research Center for Information and Physical Security
Degree 【 display / non-display 】
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Doctor of Engineering - Tokyo Institute of Technology
Campus Career 【 display / non-display 】
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2024.4
Concurrently Yokohama National UniversityOrganization for the Promotion of Education Specially Appointed Assistant Professor
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2022.4
Duty Yokohama National UniversityInstitute of Advanced Sciences Specially Appointed Assistant Professor
Academic Society Affiliations 【 display / non-display 】
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2024
IEEE
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2023
IACR
Research Areas 【 display / non-display 】
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Informatics / Information security / 暗号学
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Informatics / Information theory / 暗号学
Papers 【 display / non-display 】
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Post-Quantum Fujisaki-Okamoto Transformation for Anonymous Identity-Based Encryption
Yui Tuchiya, Toi Tomita, Junji Shikata
The 28th Annual International Conference on Information Security and Cryptology 2025.11 [Reviewed]
Authorship：Corresponding author Language：English Publishing type：Research paper (international conference proceedings) Joint Work
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How to Apply Fujisaki-Okamoto Transformation to Registration-Based Encryption
Sohto Chiku, Keisuke Hara, Keitaro Hashimoto, Toi Tomita & Junji Shikata
Cryptology and Network Security (CANS 2024), Springer 14906 145 - 165 2024.9 [Reviewed]
Authorship：Corresponding author Language：English Publishing type：Research paper (scientific journal) Joint Work
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Efficient Identity-Based Encryption with Tight Adaptive Anonymity from RLWE
Toi Tomita and Junji Shikata
Post-Quantum Cryptography (PQCrypto 2024), Springer 14771 300 - 321 2024.6 [Reviewed]
Authorship：Lead author, Corresponding author Language：English Publishing type：Research paper (international conference proceedings) Joint Work
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Shuichi Katsumata, Toi Tomita, and Shota Yamada
Designs, Codes and Cryptography 91 391 - 431 2022.9 [Reviewed]
Authorship：Corresponding author Language：English Publishing type：Research paper (scientific journal) Joint Work
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Boosting CPA to CCA2 for Leakage-Resilient Attribute-Based Encryption by Using New QA-NIZK
Toi TOMITA, Wakaha Ogata, Kaoru KUROSAWA
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences 2022.3 [Reviewed]
Authorship：Lead author, Corresponding author Language：English Publishing type：Research paper (scientific journal) Joint Work
Review Papers 【 display / non-display 】
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量子コンピュータ時代の高機能暗号
四方順司, 佐藤慎悟, ジョヒョンロク, 冨田斗威
電子情報通信学会論文誌 106 ( 11 ) 1010 - 1014 2023.11
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (scientific journal) Single Work
Awards 【 display / non-display 】
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CSS2024優秀論文賞
2024.10 一般社団法人 情報処理学会 コンピュータセキュリティ研究会（CSEC）
Individual or group name of awards：知久 奏斗, 原 啓祐, 橋本 啓太郎, 冨田 斗威, 四方 順司
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国際会議IWSEC 2019, Best Student Paper Award
2019.8 電子情報通信学会，情報処理学会
Individual or group name of awards：Toi Tomita
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The KISTI Award for MobiSec2023 Best Paper
2023.12 KISTI (Korea Institute of Science and Technology Information)
Individual or group name of awards：Yohei Watanabe, Toi Tomita, Junji Shikata
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電子情報通信学会 情報セキュリティ研究専門委員会 SCIS論文賞
2020.1 電子情報通信学会
Individual or group name of awards：冨田斗威
Grant-in-Aid for Scientific Research 【 display / non-display 】
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耐量子計算機安全な登録型IDベース暗号の社会普及と実用化に向けた研究開発
Grant number：25K21197 2025.4 - 2028.3
Grant-in-Aid for Early-Career Scientists
Presentations 【 display / non-display 】
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Post-Quantum Fujisaki-Okamoto Transformation for Anonymous Identity-Based Encryption
Yui Tuchiya, Toi Tomita, Junji Shikata
The 28th Annual International Conference on Information Security and Cryptology
Event date： 2025.11
Language：English Presentation type：Oral presentation (general)
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How to Apply Fujisaki-Okamoto Transformation to Registration-Based Encryption
Sohto Chiku, Keisuke Hara, Keitaro Hashimoto, Toi Tomita, Junji Shikata
23rd International Conference on Cryptology And Network Security
Event date： 2024.9
Language：English Presentation type：Oral presentation (general)
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Efficient Identity-Based Encryption with Tight Adaptive Anonymity from RLWE
Toi Tomita, Junji Shikata
The 15th International Conference on Post-Quantum Cryptography
Event date： 2024.6
Language：English Presentation type：Oral presentation (general)
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CCA 安全な登録ベース暗号の効率的な構成方法
冨田斗威
2026年 暗号と情報セキュリティシンポジウム
Event date： 2026.1
Language：Japanese Presentation type：Oral presentation (general)
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サーバ援用型脳内署名のユーザインターフェースの設計と評価：ワンタイム秘密画像の利用
原田竜之介, 梶原聖矢, 小桐斗馬, 髙林和希, 畠山渉, 冨田斗威, 高橋健太, 尾形わかは, 大木哲史, 西垣正勝
2026年 暗号と情報セキュリティシンポジウム
Event date： 2026.1
Language：Japanese Presentation type：Oral presentation (general)
Charge of on-campus class subject 【 display / non-display 】
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2026 Introductory Exercises in Information Engineering
College of Engineering Science
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2026 Applied Information Engineering I
College of Engineering Science
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2026 Digital Signal Processing
College of Engineering Science
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2026 Theory of Computation Ⅱ
College of Engineering Science
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2026 Cyber-Physical Network Architecture
College of Engineering Science