| 2026 | CRYPTO | Multi-copy Security in Quantum Cryptography and More. | Alper akan, Vipul Goyal, Fuyuki Kitagawa, Ryo Nishimaki, Takashi Yamakawa |
| 2026 | CRYPTO | A Unified Approach to Quantum Key Leasing with a Classical Lessor. | Fuyuki Kitagawa, Jiahui Liu, Shota Yamada, Takashi Yamakawa |
| 2026 | CRYPTO | A Unifying Umbrella for Circular-Secure Cryptographic Primitives. | Fuyuki Kitagawa, Takahiro Matsuda |
| 2026 | EuroCrypt | Copy-Protection from Unclonable Puncturable Obfuscation, Revisited. | Prabhanjan Ananth, Amit Behera, Zikuan Huang, Fuyuki Kitagawa, Takashi Yamakawa |
| 2026 | EuroCrypt | Collusion-Resistant Quantum Secure Key Leasing Beyond Decryption. | Fuyuki Kitagawa, Ryo Nishimaki, Nikhil Pappu |
| 2025 | CRYPTO | PKE and ABE with Collusion-Resistant Secure Key Leasing. | Fuyuki Kitagawa, Ryo Nishimaki, Nikhil Pappu |
| 2025 | EuroCrypt | A Simple Framework for Secure Key Leasing. | Fuyuki Kitagawa, Tomoyuki Morimae, Takashi Yamakawa |
| 2025 | PKC | Non-committing Identity Based Encryption: Constructions and Applications. | Rishab Goyal, Fuyuki Kitagawa, Venkata Koppula, Ryo Nishimaki, Mahesh Sreekumar Rajasree, Takashi Yamakawa |
| 2025 | TCC | Untelegraphable Encryption and its Applications. | Jeffrey Champion, Fuyuki Kitagawa, Ryo Nishimaki, Takashi Yamakawa |
| 2025 | TCC | Foundations of Single-Decryptor Encryption. | Fuyuki Kitagawa, Takashi Yamakawa |
| 2024 | CRYPTO | Quantum Public-Key Encryption with Tamper-Resilient Public Keys from One-Way Functions. | Fuyuki Kitagawa, Tomoyuki Morimae, Ryo Nishimaki, Takashi Yamakawa |
| 2024 | EuroCrypt | Certified Everlasting Secure Collusion-Resistant Functional Encryption, and More. | Taiga Hiroka, Fuyuki Kitagawa, Tomoyuki Morimae, Ryo Nishimaki, Tapas Pal, Takashi Yamakawa |
| 2024 | TCC | Robust Combiners and Universal Constructions for Quantum Cryptography. | Taiga Hiroka, Fuyuki Kitagawa, Ryo Nishimaki, Takashi Yamakawa |
| 2023 | EuroCrypt | Public Key Encryption with Secure Key Leasing. | Shweta Agrawal, Fuyuki Kitagawa, Ryo Nishimaki, Shota Yamada, Takashi Yamakawa |
| 2023 | STOC | Obfuscation of Pseudo-Deterministic Quantum Circuits. | James Bartusek, Fuyuki Kitagawa, Ryo Nishimaki, Takashi Yamakawa |
| 2023 | TCC | One-Out-of-Many Unclonable Cryptography: Definitions, Constructions, and More. | Fuyuki Kitagawa, Ryo Nishimaki |
| 2023 | TCC | Publicly Verifiable Deletion from Minimal Assumptions. | Fuyuki Kitagawa, Ryo Nishimaki, Takashi Yamakawa |
| 2022 | ASIACRYPT | Functional Encryption with Secure Key Leasing. | Fuyuki Kitagawa, Ryo Nishimaki |
| 2022 | EuroCrypt | Watermarking PRFs Against Quantum Adversaries. | Fuyuki Kitagawa, Ryo Nishimaki |
| 2022 | PKC | KDM Security for the Fujisaki-Okamoto Transformations in the QROM. | Fuyuki Kitagawa, Ryo Nishimaki |
| 2022 | TCC | Bounded Functional Encryption for Turing Machines: Adaptive Security from General Assumptions. | Shweta Agrawal, Fuyuki Kitagawa, Anuja Modi, Ryo Nishimaki, Shota Yamada, Takashi Yamakawa |
| 2021 | TCC | Secure Software Leasing from Standard Assumptions. | Fuyuki Kitagawa, Ryo Nishimaki, Takashi Yamakawa |
| 2020 | ASIACRYPT | Circular Security Is Complete for KDM Security. | Fuyuki Kitagawa, Takahiro Matsuda |
| 2020 | ASIACRYPT | Non-committing Encryption with Constant Ciphertext Expansion from Standard Assumptions. | Yusuke Yoshida, Fuyuki Kitagawa, Keita Xagawa, Keisuke Tanaka |
| 2020 | ICISC | Secret Sharing with Statistical Privacy and Computational Relaxed Non-malleability. | Tasuku Narita, Fuyuki Kitagawa, Yusuke Yoshida, Keisuke Tanaka |
| 2020 | TCC | NIZK from SNARG. | Fuyuki Kitagawa, Takahiro Matsuda, Takashi Yamakawa |
| 2019 | ASIACRYPT | Simple and Efficient KDM-CCA Secure Public Key Encryption. | Fuyuki Kitagawa, Takahiro Matsuda, Keisuke Tanaka |
| 2019 | ASIACRYPT | Non-Committing Encryption with Quasi-Optimal Ciphertext-Rate Based on the DDH Problem. | Yusuke Yoshida, Fuyuki Kitagawa, Keisuke Tanaka |
| 2019 | CRYPTO | CCA Security and Trapdoor Functions via Key-Dependent-Message Security. | Fuyuki Kitagawa, Takahiro Matsuda, Keisuke Tanaka |
| 2019 | CRYPTO | Adaptively Secure and Succinct Functional Encryption: Improving Security and Efficiency, Simultaneously. | Fuyuki Kitagawa, Ryo Nishimaki, Keisuke Tanaka, Takashi Yamakawa |
| 2019 | IWSEC | Equivalence Between Non-malleability Against Replayable CCA and Other RCCA-Security Notions. | Junichiro Hayata, Fuyuki Kitagawa, Yusuke Sakai, Goichiro Hanaoka, Kanta Matsuura |
| 2019 | TCC | CPA-to-CCA Transformation for KDM Security. | Fuyuki Kitagawa, Takahiro Matsuda |
| 2018 | ASIACRYPT | A Framework for Achieving KDM-CCA Secure Public-Key Encryption. | Fuyuki Kitagawa, Keisuke Tanaka |
| 2018 | EuroCrypt | Obfustopia Built on Secret-Key Functional Encryption. | Fuyuki Kitagawa, Ryo Nishimaki, Keisuke Tanaka |
| 2018 | PKC | Simple and Generic Constructions of Succinct Functional Encryption. | Fuyuki Kitagawa, Ryo Nishimaki, Keisuke Tanaka |
| 2018 | PKC | Key Dependent Message Security and Receiver Selective Opening Security for Identity-Based Encryption. | Fuyuki Kitagawa, Keisuke Tanaka |
| 2018 | ProvSec | Formal Treatment of Verifiable Privacy-Preserving Data-Aggregation Protocols. | Satoshi Yasuda, Yoshihiro Koseki, Yusuke Sakai, Fuyuki Kitagawa, Yutaka Kawai, Goichiro Hanaoka |
| 2018 | SCN | Simulation-Based Receiver Selective Opening CCA Secure PKE from Standard Computational Assumptions. | Keisuke Hara, Fuyuki Kitagawa, Takahiro Matsuda, Goichiro Hanaoka, Keisuke Tanaka |
| 2016 | PKC | On the Key Dependent Message Security of the Fujisaki-Okamoto Constructions. | Fuyuki Kitagawa, Takahiro Matsuda, Goichiro Hanaoka, Keisuke Tanaka |
| 2014 | ICISC | Efficient Key Dependent Message Security Amplification Against Chosen Ciphertext Attacks. | Fuyuki Kitagawa, Takahiro Matsuda, Goichiro Hanaoka, Keisuke Tanaka |