| 2026 | CRYPTO | Separating Non-interactive Classical Verification of Quantum Computation from Falsifiable Assumptions. | Mohammed Barhoush, Tomoyuki Morimae, Ryo Nishimaki, Takashi Yamakawa |
| 2026 | CRYPTO | Multi-copy Security in Quantum Cryptography and More. | Alper akan, Vipul Goyal, Fuyuki Kitagawa, Ryo Nishimaki, Takashi Yamakawa |
| 2026 | EuroCrypt | Collusion-Resistant Quantum Secure Key Leasing Beyond Decryption. | Fuyuki Kitagawa, Ryo Nishimaki, Nikhil Pappu |
| 2025 | ASIACRYPT | MicroCrypt Assumptions with Quantum Input Sampling and Pseudodeterminism: Constructions and Separations. | Mohammed Barhoush, Ryo Nishimaki, Takashi Yamakawa |
| 2025 | CRYPTO | PKE and ABE with Collusion-Resistant Secure Key Leasing. | Fuyuki Kitagawa, Ryo Nishimaki, Nikhil Pappu |
| 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 |
| 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 | CRYPTO | Certified Everlasting Zero-Knowledge Proof for QMA. | Taiga Hiroka, Tomoyuki Morimae, Ryo Nishimaki, Takashi Yamakawa |
| 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 | PKC | The Direction of Updatable Encryption Does Matter. | 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 | ASIACRYPT | Quantum Encryption with Certified Deletion, Revisited: Public Key, Attribute-Based, and Classical Communication. | Taiga Hiroka, Tomoyuki Morimae, Ryo Nishimaki, Takashi Yamakawa |
| 2021 | EuroCrypt | Round-Optimal Blind Signatures in the Plain Model from Classical and Quantum Standard Assumptions. | Shuichi Katsumata, Ryo Nishimaki, Shota Yamada, Takashi Yamakawa |
| 2021 | PKC | Universal Proxy Re-Encryption. | Nico Dttling, Ryo Nishimaki |
| 2021 | TCC | Secure Software Leasing from Standard Assumptions. | Fuyuki Kitagawa, Ryo Nishimaki, Takashi Yamakawa |
| 2020 | ASIACRYPT | Adaptively Secure Inner Product Encryption from LWE. | Shuichi Katsumata, Ryo Nishimaki, Shota Yamada, Takashi Yamakawa |
| 2020 | CRYPTO | Adaptively Secure Constrained Pseudorandom Functions in the Standard Model. | Alex Davidson, Shuichi Katsumata, Ryo Nishimaki, Shota Yamada, Takashi Yamakawa |
| 2020 | EuroCrypt | Compact NIZKs from Standard Assumptions on Bilinear Maps. | Shuichi Katsumata, Ryo Nishimaki, Shota Yamada, Takashi Yamakawa |
| 2020 | PKC | Fast, Compact, and Expressive Attribute-Based Encryption. | Junichi Tomida, Yuto Kawahara, Ryo Nishimaki |
| 2020 | TCC | Equipping Public-Key Cryptographic Primitives with Watermarking (or: A Hole Is to Watermark). | Ryo Nishimaki |
| 2019 | CRYPTO | Exploring Constructions of Compact NIZKs from Various Assumptions. | Shuichi Katsumata, Ryo Nishimaki, Shota Yamada, Takashi Yamakawa |
| 2019 | CRYPTO | Adaptively Secure and Succinct Functional Encryption: Improving Security and Efficiency, Simultaneously. | Fuyuki Kitagawa, Ryo Nishimaki, Keisuke Tanaka, Takashi Yamakawa |
| 2019 | EuroCrypt | Designated Verifier/Prover and Preprocessing NIZKs from Diffie-Hellman Assumptions. | Shuichi Katsumata, Ryo Nishimaki, Shota Yamada, Takashi Yamakawa |
| 2019 | PKC | Adaptively Single-Key Secure Constrained PRFs for \mathrm NC^1. | Nuttapong Attrapadung, Takahiro Matsuda, Ryo Nishimaki, Shota Yamada, Takashi Yamakawa |
| 2019 | PKC | Leakage-Resilient Identity-Based Encryption in Bounded Retrieval Model with Nearly Optimal Leakage-Ratio. | Ryo Nishimaki, Takashi Yamakawa |
| 2018 | CRYPTO | Constrained PRFs for \mathrmNC^1 in Traditional Groups. | Nuttapong Attrapadung, Takahiro Matsuda, Ryo Nishimaki, Shota Yamada, Takashi Yamakawa |
| 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 |
| 2017 | CRYPTO | Compact Structure-Preserving Signatures with Almost Tight Security. | Masayuki Abe, Dennis Hofheinz, Ryo Nishimaki, Miyako Ohkubo, Jiaxin Pan |
| 2016 | EuroCrypt | Anonymous Traitor Tracing: How to Embed Arbitrary Information in a Key. | Ryo Nishimaki, Daniel Wichs, Mark Zhandry |
| 2016 | STOC | Watermarking cryptographic capabilities. | Aloni Cohen, Justin Holmgren, Ryo Nishimaki, Vinod Vaikuntanathan, Daniel Wichs |
| 2016 | TCC | From Cryptomania to Obfustopia Through Secret-Key Functional Encryption. | Nir Bitansky, Ryo Nishimaki, Alain Passelgue, Daniel Wichs |
| 2014 | PKC | Re-encryption, Functional Re-encryption, and Multi-hop Re-encryption: A Framework for Achieving Obfuscation-Based Security and Instantiations from Lattices. | Nishanth Chandran, Melissa Chase, Feng-Hao Liu, Ryo Nishimaki, Keita Xagawa |
| 2013 | EuroCrypt | How to Watermark Cryptographic Functions. | Ryo Nishimaki |
| 2013 | PKC | Tagged One-Time Signatures: Tight Security and Optimal Tag Size. | Masayuki Abe, Bernardo David, Markulf Kohlweiss, Ryo Nishimaki, Miyako Ohkubo |
| 2013 | PKC | Verifiably Encrypted Signatures with Short Keys Based on the Decisional Linear Problem and Obfuscation for Encrypted VES. | Ryo Nishimaki, Keita Xagawa |
| 2012 | ASIACRYPT | Constant-Size Structure-Preserving Signatures: Generic Constructions and Simple Assumptions. | Masayuki Abe, Melissa Chase, Bernardo David, Markulf Kohlweiss, Ryo Nishimaki, Miyako Ohkubo |
| 2010 | ACISP | A Multi-trapdoor Commitment Scheme from the RSA Assumption. | Ryo Nishimaki, Eiichiro Fujisaki, Keisuke Tanaka |
| 2010 | PKC | CCA Proxy Re-Encryption without Bilinear Maps in the Standard Model. | Toshihide Matsuda, Ryo Nishimaki, Keisuke Tanaka |
| 2009 | ACISP | Security on Hybrid Encryption with the Tag-KEM/DEM Framework. | Toshihide Matsuda, Ryo Nishimaki, Akira Numayama, Keisuke Tanaka |
| 2009 | ProvSec | On the Insecurity of the Fiat-Shamir Signatures with Iterative Hash Functions. | Eiichiro Fujisaki, Ryo Nishimaki, Keisuke Tanaka |
| 2009 | ProvSec | Efficient Non-interactive Universally Composable String-Commitment Schemes. | Ryo Nishimaki, Eiichiro Fujisaki, Keisuke Tanaka |