フェロー／上席特別研究員／特別研究員

表彰

• 2015年　電子情報通信学会SCIS論文賞
• 2020年　東京工業大学手島精一記念研究賞（博士論文賞）
• 2025年　電子情報通信学会SCISイノベーション論文賞

学会役員等

• PKC 2022, 2024 program committee member
• ASIACRYPT 2024 program committee member
• CT-RSA 2025 program committee member

論文

主な論文

• Fuyuki Kitagawa, Ryo Nishimaki, and Keisuke Tanaka, Obfustopia Built on Secret-Key Functional Encryption, EUROCRYPT 2018.
• Fuyuki Kitagawa, Takahiro Matsuda, and Keisuke Tanaka, CCA Security and Trapdoor Functions via Key-Dependent-Message Security, CRYPTO 2019.
• Fuyuki Kitagawa and Takahiro Matsuda, CPA-to-CCA Transformation for KDM Security, TCC 2019.
• Fuyuki Kitagawa, Ryo Nishimaki, and Takashi Yamakawa, Secure Software Leasing from Standard Assumptions, TCC 2021.
• Fuyuki Kitagawa and Ryo Nishimaki, Watermarking PRFs Against Quantum Adversaries, EUROCRYPT 2022.
• Fuyuki Kitagawa and Ryo Nishimaki, Functional Encryption with Secure Key Leasing, ASIACRYPT 2022.
• Fuyuki Kitagawa, Tomoyuki Morimae, and Takashi Yamakawa, A Simple Framework for Secure Key Leasing, EUROCRYPT 2025.
• Fuyuki Kitagawa, Ryo Nishimaki, and Nikhil Pappu, PKE and ABE with Collusion-Resistant Secure Key Leasing, CRYPTO 2025.

招待講演

• IWSEC 2015, Completeness of Single-Bit Projection-KDM Security for Public Key Encryption" The 10th International Workshop on Security
• Tokyo Crypto Day, From Single-Key to Collusion-Resistant Secret-Key Functional Encryption by Leveraging Succinctness
• 第 11 回公開鍵暗号の安全な構成とその応用ワークショップ、Key Dependent Message Security and Receiver Selective Opening Security for Identity-Based Encryption (PKC '18 より)
• 情報セキュリティ研究会(ISEC) 、Obfustopia Built on Secret-Key Functional Encryption (from EUROCRYPT 2018)
• 第 12 回公開鍵暗号の安全な構成とその応用ワークショップ、A Framework for Achieving KDM-CCA Secure Public-Key Encryption (ASIACRYPT '18 より)
• WCIS 2022, Watermarking PRFs against Quantum Adversaries
• 九大IMI共同利用研究集会、「情報・計算・暗号の融合による新しい数理基盤の創出」、Cryptographic Primitives with Quantum Secure Key Leasing

技術キーワード

公開鍵暗号、暗号文改ざん耐性、関数型暗号、量子情報、量子通貨、プログラムコピー防止