日本語
The University of Electro-Communications 
Graduate School of Informatics and Engineering, School of Informatics and Engineering 
"Department of Informatics, Cluster II (Emerging Multi-interdisciplinary Engineering)" 

Assistant Professor 
WATANABE Yohei 

Personal website  
Personal website  

Career
Yokohama National University  JSPS Research Fellow (DC1)  2013/04-2016/03 
National Institute of Advanced Industrial Sciences and Technology  Research Institute for Secure Systems  Technical Trainee  2014/05-2015/03 
National Institute of Advanced Industrial Sciences and Technology  Information Technology Research Institute  Technical Trainee  2015/04-2016/03 
The University of Electro-Communications  JSPS Research Fellow (PD)  2016/04-2018/09 
National Institute of Advanced Industrial Sciences and Technology  Information Technology Research Institute  Collaborative Researcher  2016/04-2018/09 
National Institute of Information and Communications Technology  Security Fundamental Laboratory, Cybersecurity Research Institute  Researcher  2018/10-2019/11 
The University of Electro-Communications  Graduate School of Informatics and Engineering  Assistant Professor  2019/12-Present 
MEXT  Leading Initiative for Excellent Young Researchers  Excellent Young Researcher  2019/12-Present 
National Institute of Information and Communications Technology  Security Fundamental Laboratory, Cybersecurity Research Institute  Invited Advisor  2020/04-Present 
National Institute of Advanced Industrial Sciences and Technology  Cyber Physical Security Research Center  Collaborative Researcher  2020/04-Present 
Japan Datacom Co., Ltd.  Research Fellow  2020/08-Present 

Academic background
Yokohama National University  Faculty of Engineering  Department of Electronics and Information Engineering  2011/03  Graduated 
Yokohama National University  Graduate School of Environment and Information Sciences  Department of Information Media and Environment Sciences  Master's program  2013/03  Completed 
Yokohama National University  Graduate School of Environment and Information Sciences  Department of Information Media and Environment Sciences  Doctoral program  2016/03  Completed 

Academic degrees
Ph.D. in Information Science  Yokohama National University  2016/03/24 
M.S. in Engineering  Yokohama National University  2013/03/22 
B.S. in Engineering  Yokohama National University  2011/03/23 

Outlines of current research
My research interests include cryptography and information security, especially in creating more efficient/new cryptographic protocols in aspects of information-theoretic security and computational security. 

Classes responsible within the university
2020  Cryptography  Fall semester  Undergraduate, daytime 
2020  Information Security Engineering Laboratory  Fall semester  Undergraduate, daytime 
2020  Cryptography and Information Security  Fall semester  Undergraduate, mainly nighttime 
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Classes responsible in other universities
2018  Computer Literacy  Japan Women’s University 
2019  Computer Literacy  Japan Women’s University 
2019  Computer Literacy  Japan Women’s University 
2019  Project Learning  Yokohama National University 
2020  Computer Literacy  Japan Women’s University 
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Education and research activities in foreign countries
4th Heidelberg Laureate Forum招待・参加  2016/09-2016/09 
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Current research areas
Information security 

Research keywords
Cryptography 

Current research subjects
検索可能暗号の機能性,安全性,効率性向上に関する研究開発  2019/12-Present 
秘密情報の漏洩に耐性のある暗号技術の研究開発  2019/12-Present 
ニーズに即した高機能暗号技術の研究開発  2019/12-Present 

Published books
Book  Proceedings of the 5th ACM Asia Public-Key Cryptography Workshop (APKC 2018)  K. Emura, J.H. Seo, and Y. Watanabe  ACM  2018 
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Published papers
Paper  Yes  Revocable Identity-based Encryption with Bounded Decryption Key Exposure Resistance: Lattice-based Construction and More  A. Takayasu and Y. Watanabe  Theoretical Computer Science  To appear  2021 
Paper  Yes  Key-Updatable Public-Key Encryption with Keyword Search (Or: How to Realize PEKS with Efficient Key Updates for IoT Environments)  Joint  H. Anada, A. Kanaoka, N. Matsuzaki, and Y. Watanabe  International Journal of Information Security  19, 15-38  2020 
Paper  Yes  Identity-based Encryption with Hierarchical Key-insulation in the Standard Model  Joint  J. Shikata and Y. Watanabe  Designs, Codes and Cryptography  87/ 5, 1005-1033  2019 
Paper  Yes  Multi-Party Computation for Modular Exponentiation based on Replicated Secret Sharing  Joint  K. Ohara, Y. Watanabe, M. Iwamoto, and K. Ohta  IEICE Transaction  102-A/ 9, 1079-1090  2019 
Paper  Yes  Timed-Release Computational Secret Sharing and Threshold Encryption  Joint  Y. Watanabe and J. Shikata  Designs, Codes and Cryptography  86/ 1, 17-54  2018 
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Intellectual property rights
Patent  動的検索可能暗号処理システム及び動的検索可能暗号処理方法  2019-111977  2019/06/17  2020-112773  2020/07/27  Published 
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Awards
CSS2019奨励賞  (強)フォワード安全な動的検索可能暗号の効率的な構成  2019 
CSS2018優秀論文賞  CBDH仮定に基づく効率的な閾値公開鍵暗号  2018 
IEEE Information Theory Society Japan Chapter Young Researcher Best Paper Award  Card-Based Majority Voting Protocols with Three Inputs Using Three Cards  2018 
SCIS論文賞  暗号文の耐改変性と復号権限の変更機能をもつ情報理論的に安全な放送型暗号  2016 
IWSEC 2014 Best Poster Award  Information-Theoretically Secure Revocable-Storage Broadcast Encryption  2014 
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Grants-in-aid for scientific research
Resilience Enhancement of IoT Ecosystem by Cryptographic Technologies  "Scientific research (C), general"  2020/04-2023/03 
Searchable Symmetric Encryption for a Long Term Use  "Scientific research (C), general"  2020/04-2022/03 
推測秘匿性に基づく情報理論的暗号理論の新展開  "Scientific research (B), general"  2017/04-2021/03 
鍵漏洩に耐性のあるIDベース暗号の高安全かつ高効率な実現  Young scientists (B)  2017/04-2021/03 
秘匿情報に対して動的アクセス制御とデータ解析を両立させる暗号理論の確立  Other  2016/04-2019/03 
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External fund
科学技術人材育成費補助金(卓越研究員事業)  Other grants  文部科学省  2019/12-2021/03 
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Past records of joint or funded research
ハイブリッド秘匿検索の高性能・高機能化  2020-Present  Joint research  Domestic joint research 
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Memberships of academic societies
International Association for Cryptographic Research (IACR)  2016/02-Present 
電子情報通信学会  2014/03-Present 
情報処理学会  2013/04-Present 
IEEE  2013/03-Present 
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Involvement in conference and research meetings
SCIS 2021  実行委員  2021 
IWSEC 2020  Program Committee  2020 
APKC 2020  Program Committee  2020 
IWSEC 2019  Local Organizing Committee  2019 
CSS 2019  実行委員  2019 
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Media coverage
Newspaper  日本経済新聞  暗号化したデータクラウドで利用容易  2019/08/05 
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Social activities
Academic journal activities  2020年 電子情報通信学会英文論文誌 情報理論とその応用小特集号編集委員  2019/05-2020/12 
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