Ryo Nishimaki

145 papers A* 3A 1C 2Misc 2Journal 93Unranked 44
YearRankTypeTitle / Venue / Authors
2026 J jnl
Separating Non-Interactive Classical Verification of Quantum Computation from Falsifiable Assumptions.
CoRR
Mohammed Barhoush, Tomoyuki Morimae, Ryo Nishimaki, Takashi Yamakawa
2026 J jnl
Separating Non-Interactive Classical Verification of Quantum Computation from Falsifiable Assumptions.
IACR Cryptol. ePrint Arch.
Mohammed Barhoush, Tomoyuki Morimae, Ryo Nishimaki, Takashi Yamakawa
2025 J jnl
Collusion-Resistant Quantum Secure Key Leasing Beyond Decryption.
CoRR
Fuyuki Kitagawa, Ryo Nishimaki, Nikhil Pappu
2025 J jnl
Collusion-Resistant Quantum Secure Key Leasing Beyond Decryption.
IACR Cryptol. ePrint Arch.
Fuyuki Kitagawa, Ryo Nishimaki, Nikhil Pappu
2025 — conf
MicroCrypt Assumptions with Quantum Input Sampling and Pseudodeterminism: Constructions and Separations.
ASIACRYPT (8)
Mohammed Barhoush, Ryo Nishimaki, Takashi Yamakawa
2025 J jnl
MicroCrypt Assumptions with Quantum Input Sampling and Pseudodeterminism: Constructions and Separations.
CoRR
Mohammed Barhoush, Ryo Nishimaki, Takashi Yamakawa
2025 J jnl
MicroCrypt Assumptions with Quantum Input Sampling and Pseudodeterminism: Constructions and Separations.
IACR Cryptol. ePrint Arch.
Mohammed Barhoush, Ryo Nishimaki, Takashi Yamakawa
2025 J jnl
Multi-Copy Security in Unclonable Cryptography.
CoRR
Alper Çakan, Vipul Goyal, Fuyuki Kitagawa, Ryo Nishimaki, Takashi Yamakawa
2025 J jnl
Multi-Copy Security in Unclonable Cryptography.
IACR Cryptol. ePrint Arch.
Alper Çakan, Vipul Goyal, Fuyuki Kitagawa, Ryo Nishimaki, Takashi Yamakawa
2025 — conf
Non-committing Identity Based Encryption: Constructions and Applications.
PKC (1)
Rishab Goyal, Fuyuki Kitagawa, Venkata Koppula, Ryo Nishimaki, Mahesh Sreekumar Rajasree, Takashi Yamakawa
2025 — conf
PKE and ABE with Collusion-Resistant Secure Key Leasing.
CRYPTO (3)
Fuyuki Kitagawa, Ryo Nishimaki, Nikhil Pappu
2025 J jnl
PKE and ABE with Collusion-Resistant Secure Key Leasing.
CoRR
Fuyuki Kitagawa, Ryo Nishimaki, Nikhil Pappu
2025 J jnl
PKE and ABE with Collusion-Resistant Secure Key Leasing.
IACR Cryptol. ePrint Arch.
Fuyuki Kitagawa, Ryo Nishimaki, Nikhil Pappu
2025 — conf
Untelegraphable Encryption and its Applications.
TCC (3)
Jeffrey Champion, Fuyuki Kitagawa, Ryo Nishimaki, Takashi Yamakawa
2025 J jnl
Untelegraphable Encryption and its Applications.
IACR Cryptol. ePrint Arch.
Jeffrey Champion, Fuyuki Kitagawa, Ryo Nishimaki, Takashi Yamakawa
2025 J jnl
White-Box Watermarking Signatures against Quantum Adversaries and Its Applications.
IACR Cryptol. ePrint Arch.
Fuyuki Kitagawa, Ryo Nishimaki
2024 J jnl
A Note on Security Definitions for Secret Sharing with Certified Deletion.
IACR Cryptol. ePrint Arch.
Dominique Bazin, Ryo Nishimaki
2024 — conf
Certified Everlasting Secure Collusion-Resistant Functional Encryption, and More.
EUROCRYPT (3)
Taiga Hiroka, Fuyuki Kitagawa, Tomoyuki Morimae, Ryo Nishimaki, Tapas Pal, Takashi Yamakawa
2024 J jnl
Compact NIZKs from Standard Assumptions on Bilinear Maps.
J. Cryptol.
Shuichi Katsumata, Ryo Nishimaki, Shota Yamada, Takashi Yamakawa
2024 J jnl
Pre-Constrained Cryptography: Broad Definitions, New Constructions, Unbounded Security.
IACR Cryptol. ePrint Arch.
Shweta Agrawal, Simran Kumari, Ryo Nishimaki
2024 — conf
Quantum Public-Key Encryption with Tamper-Resilient Public Keys from One-Way Functions.
CRYPTO (7)
Fuyuki Kitagawa, Tomoyuki Morimae, Ryo Nishimaki, Takashi Yamakawa
2024 — conf
Robust Combiners and Universal Constructions for Quantum Cryptography.
TCC (2)
Taiga Hiroka, Fuyuki Kitagawa, Ryo Nishimaki, Takashi Yamakawa
2024 J jnl
Untelegraphable Encryption and its Applications.
CoRR
Jeffrey Champion, Fuyuki Kitagawa, Ryo Nishimaki, Takashi Yamakawa
2024 J jnl
Watermarking PRFs and PKE Against Quantum Adversaries.
J. Cryptol.
Fuyuki Kitagawa, Ryo Nishimaki
2023 J jnl
Certified Everlasting Secure Collusion-Resistant Functional Encryption, and More.
CoRR
Taiga Hiroka, Fuyuki Kitagawa, Tomoyuki Morimae, Ryo Nishimaki, Tapas Pal, Takashi Yamakawa
2023 J jnl
Certified Everlasting Secure Collusion-Resistant Functional Encryption, and More.
IACR Cryptol. ePrint Arch.
Taiga Hiroka, Fuyuki Kitagawa, Tomoyuki Morimae, Ryo Nishimaki, Tapas Pal, Takashi Yamakawa
2023 J jnl
Compact Structure-Preserving Signatures with Almost Tight Security.
J. Cryptol.
Masayuki Abe, Dennis Hofheinz, Ryo Nishimaki, Miyako Ohkubo, Jiaxin Pan
2023 A* conf
Obfuscation of Pseudo-Deterministic Quantum Circuits.
STOC
James Bartusek, Fuyuki Kitagawa, Ryo Nishimaki, Takashi Yamakawa
2023 J jnl
Obfuscation of Pseudo-Deterministic Quantum Circuits.
CoRR
James Bartusek, Fuyuki Kitagawa, Ryo Nishimaki, Takashi Yamakawa
2023 J jnl
Obfuscation of Pseudo-Deterministic Quantum Circuits.
IACR Cryptol. ePrint Arch.
James Bartusek, Fuyuki Kitagawa, Ryo Nishimaki, Takashi Yamakawa
2023 — conf
One-Out-of-Many Unclonable Cryptography: Definitions, Constructions, and More.
TCC (4)
Fuyuki Kitagawa, Ryo Nishimaki
2023 J jnl
One-out-of-Many Unclonable Cryptography: Definitions, Constructions, and More.
CoRR
Fuyuki Kitagawa, Ryo Nishimaki
2023 J jnl
One-out-of-Many Unclonable Cryptography: Definitions, Constructions, and More.
IACR Cryptol. ePrint Arch.
Fuyuki Kitagawa, Ryo Nishimaki
2023 — conf
Public Key Encryption with Secure Key Leasing.
EUROCRYPT (1)
Shweta Agrawal, Fuyuki Kitagawa, Ryo Nishimaki, Shota Yamada, Takashi Yamakawa
2023 J jnl
Public Key Encryption with Secure Key Leasing.
CoRR
Shweta Agrawal, Fuyuki Kitagawa, Ryo Nishimaki, Shota Yamada, Takashi Yamakawa
2023 J jnl
Public Key Encryption with Secure Key Leasing.
IACR Cryptol. ePrint Arch.
Shweta Agrawal, Fuyuki Kitagawa, Ryo Nishimaki, Shota Yamada, Takashi Yamakawa
2023 — conf
Publicly Verifiable Deletion from Minimal Assumptions.
TCC (4)
Fuyuki Kitagawa, Ryo Nishimaki, Takashi Yamakawa
2023 J jnl
Publicly Verifiable Deletion from Minimal Assumptions.
CoRR
Fuyuki Kitagawa, Ryo Nishimaki, Takashi Yamakawa
2023 J jnl
Publicly Verifiable Deletion from Minimal Assumptions.
IACR Cryptol. ePrint Arch.
Fuyuki Kitagawa, Ryo Nishimaki, Takashi Yamakawa
2023 J jnl
Quantum Public-Key Encryption with Tamper-Resilient Public Keys from One-Way Functions.
CoRR
Fuyuki Kitagawa, Tomoyuki Morimae, Ryo Nishimaki, Takashi Yamakawa
2023 J jnl
Quantum Public-Key Encryption with Tamper-Resilient Public Keys from One-Way Functions.
IACR Cryptol. ePrint Arch.
Fuyuki Kitagawa, Tomoyuki Morimae, Ryo Nishimaki, Takashi Yamakawa
2023 J jnl
Robust Combiners and Universal Constructions for Quantum Cryptography.
IACR Cryptol. ePrint Arch.
Taiga Hiroka, Fuyuki Kitagawa, Ryo Nishimaki, Takashi Yamakawa
2022 — conf
Bounded Functional Encryption for Turing Machines: Adaptive Security from General Assumptions.
TCC (1)
Shweta Agrawal, Fuyuki Kitagawa, Anuja Modi, Ryo Nishimaki, Shota Yamada, Takashi Yamakawa
2022 J jnl
Bounded Functional Encryption for Turing Machines: Adaptive Security from General Assumptions.
IACR Cryptol. ePrint Arch.
Shweta Agrawal, Fuyuki Kitagawa, Anuja Modi, Ryo Nishimaki, Shota Yamada, Takashi Yamakawa
2022 J jnl
Certified Everlasting Functional Encryption.
CoRR
Taiga Hiroka, Tomoyuki Morimae, Ryo Nishimaki, Takashi Yamakawa
2022 J jnl
Certified Everlasting Functional Encryption.
IACR Cryptol. ePrint Arch.
Taiga Hiroka, Tomoyuki Morimae, Ryo Nishimaki, Takashi Yamakawa
2022 — conf
Certified Everlasting Zero-Knowledge Proof for QMA.
CRYPTO (1)
Taiga Hiroka, Tomoyuki Morimae, Ryo Nishimaki, Takashi Yamakawa
2022 J jnl
Cryptanalysis of Boyen's attribute-based encryption scheme in TCC 2013.
Des. Codes Cryptogr.
Shweta Agrawal, Rajarshi Biswas, Ryo Nishimaki, Keita Xagawa, Xiang Xie, Shota Yamada
2022 — conf
Functional Encryption with Secure Key Leasing.
ASIACRYPT (4)
Fuyuki Kitagawa, Ryo Nishimaki
2022 J jnl
Functional Encryption with Secure Key Leasing.
CoRR
Fuyuki Kitagawa, Ryo Nishimaki
2022 J jnl
Functional Encryption with Secure Key Leasing.
IACR Cryptol. ePrint Arch.
Fuyuki Kitagawa, Ryo Nishimaki
2022 — conf
KDM Security for the Fujisaki-Okamoto Transformations in the QROM.
Public Key Cryptography (2)
Fuyuki Kitagawa, Ryo Nishimaki
2022 J jnl
Obfustopia Built on Secret-Key Functional Encryption.
J. Cryptol.
Fuyuki Kitagawa, Ryo Nishimaki, Keisuke Tanaka
2022 — conf
The Direction of Updatable Encryption Does Matter.
Public Key Cryptography (2)
Ryo Nishimaki
2022 — conf
Watermarking PRFs Against Quantum Adversaries.
EUROCRYPT (3)
Fuyuki Kitagawa, Ryo Nishimaki
2022 J jnl
Watermarking PRFs against Quantum Adversaries.
CoRR
Fuyuki Kitagawa, Ryo Nishimaki
2022 J jnl
Watermarking PRFs against Quantum Adversaries.
IACR Cryptol. ePrint Arch.
Fuyuki Kitagawa, Ryo Nishimaki
2021 J jnl
Certified Everlasting Zero-Knowledge Proof for QMA.
CoRR
Taiga Hiroka, Tomoyuki Morimae, Ryo Nishimaki, Takashi Yamakawa
2021 J jnl
Certified Everlasting Zero-Knowledge Proof for QMA.
IACR Cryptol. ePrint Arch.
Taiga Hiroka, Tomoyuki Morimae, Ryo Nishimaki, Takashi Yamakawa
2021 J jnl
Compact Designated Verifier NIZKs from the CDH Assumption Without Pairings.
J. Cryptol.
Shuichi Katsumata, Ryo Nishimaki, Shota Yamada, Takashi Yamakawa
2021 J jnl
Cryptanalysis of Boyen's Attribute-Based Encryption Scheme in TCC 2013.
IACR Cryptol. ePrint Arch.
Shweta Agrawal, Rajarshi Biswas, Ryo Nishimaki, Keita Xagawa, Xiang Xie, Shota Yamada
2021 J jnl
Fast, compact, and expressive attribute-based encryption.
Des. Codes Cryptogr.
Junichi Tomida, Yuto Kawahara, Ryo Nishimaki
2021 J jnl
KDM Security for the Fujisaki-Okamoto Transformations in the QROM.
IACR Cryptol. ePrint Arch.
Fuyuki Kitagawa, Ryo Nishimaki
2021 J jnl
Obfustopia Built on Secret-Key Functional Encryption.
IACR Cryptol. ePrint Arch.
Fuyuki Kitagawa, Ryo Nishimaki, Keisuke Tanaka
2021 — conf
Quantum Encryption with Certified Deletion, Revisited: Public Key, Attribute-Based, and Classical Communication.
ASIACRYPT (1)
Taiga Hiroka, Tomoyuki Morimae, Ryo Nishimaki, Takashi Yamakawa
2021 J jnl
Quantum Encryption with Certified Deletion, Revisited: Public Key, Attribute-Based, and Classical Communication.
CoRR
Taiga Hiroka, Tomoyuki Morimae, Ryo Nishimaki, Takashi Yamakawa
2021 J jnl
Quantum Encryption with Certified Deletion, Revisited: Public Key, Attribute-Based, and Classical Communication.
IACR Cryptol. ePrint Arch.
Taiga Hiroka, Tomoyuki Morimae, Ryo Nishimaki, Takashi Yamakawa
2021 J jnl
Quantum Encryption with Certified Deletion: Public Key and Attribute-Based.
IACR Cryptol. ePrint Arch.
Ryo Nishimaki, Takashi Yamakawa
2021 — conf
Round-Optimal Blind Signatures in the Plain Model from Classical and Quantum Standard Assumptions.
EUROCRYPT (1)
Shuichi Katsumata, Ryo Nishimaki, Shota Yamada, Takashi Yamakawa
2021 J jnl
Round-Optimal Blind Signatures in the Plain Model from Classical and Quantum Standard Assumptions.
IACR Cryptol. ePrint Arch.
Shuichi Katsumata, Ryo Nishimaki, Shota Yamada, Takashi Yamakawa
2021 — conf
Secure Software Leasing from Standard Assumptions.
TCC (1)
Fuyuki Kitagawa, Ryo Nishimaki, Takashi Yamakawa
2021 J jnl
Simple and Generic Constructions of Succinct Functional Encryption.
J. Cryptol.
Fuyuki Kitagawa, Ryo Nishimaki, Keisuke Tanaka
2021 J jnl
The Direction of Updatable Encryption Does Matter.
IACR Cryptol. ePrint Arch.
Ryo Nishimaki
2021 — conf
Universal Proxy Re-Encryption.
Public Key Cryptography (1)
Nico Döttling, Ryo Nishimaki
2020 — conf
Adaptively Secure Constrained Pseudorandom Functions in the Standard Model.
CRYPTO (1)
Alex Davidson, Shuichi Katsumata, Ryo Nishimaki, Shota Yamada, Takashi Yamakawa
2020 J jnl
Adaptively Secure Constrained Pseudorandom Functions in the Standard Model.
IACR Cryptol. ePrint Arch.
Alex Davidson, Shuichi Katsumata, Ryo Nishimaki, Shota Yamada, Takashi Yamakawa
2020 — conf
Adaptively Secure Inner Product Encryption from LWE.
ASIACRYPT (3)
Shuichi Katsumata, Ryo Nishimaki, Shota Yamada, Takashi Yamakawa
2020 J jnl
Adaptively Secure Inner Product Encryption from LWE.
IACR Cryptol. ePrint Arch.
Shuichi Katsumata, Ryo Nishimaki, Shota Yamada, Takashi Yamakawa
2020 — conf
Compact NIZKs from Standard Assumptions on Bilinear Maps.
EUROCRYPT (3)
Shuichi Katsumata, Ryo Nishimaki, Shota Yamada, Takashi Yamakawa
2020 J jnl
Compact NIZKs from Standard Assumptions on Bilinear Maps.
IACR Cryptol. ePrint Arch.
Shuichi Katsumata, Ryo Nishimaki, Shota Yamada, Takashi Yamakawa
2020 — conf
Equipping Public-Key Cryptographic Primitives with Watermarking (or: A Hole Is to Watermark).
TCC (1)
Ryo Nishimaki
2020 J jnl
Equipping Public-Key Cryptographic Primitives with Watermarking (or: A Hole Is to Watermark).
IACR Cryptol. ePrint Arch.
Ryo Nishimaki
2020 — conf
Fast, Compact, and Expressive Attribute-Based Encryption.
Public Key Cryptography (1)
Junichi Tomida, Yuto Kawahara, Ryo Nishimaki
2020 J jnl
From Cryptomania to Obfustopia Through Secret-Key Functional Encryption.
J. Cryptol.
Nir Bitansky, Ryo Nishimaki, Alain Passelègue, Daniel Wichs
2020 J jnl
Secure Software Leasing from Standard Assumptions.
CoRR
Fuyuki Kitagawa, Ryo Nishimaki, Takashi Yamakawa
2020 J jnl
Secure Software Leasing from Standard Assumptions.
IACR Cryptol. ePrint Arch.
Fuyuki Kitagawa, Ryo Nishimaki, Takashi Yamakawa
2019 — conf
Adaptively Secure and Succinct Functional Encryption: Improving Security and Efficiency, Simultaneously.
CRYPTO (3)
Fuyuki Kitagawa, Ryo Nishimaki, Keisuke Tanaka, Takashi Yamakawa
2019 — conf
Adaptively Single-Key Secure Constrained PRFs for \mathrm NC^1.
Public Key Cryptography (2)
Nuttapong Attrapadung, Takahiro Matsuda, Ryo Nishimaki, Shota Yamada, Takashi Yamakawa
2019 — conf
Designated Verifier/Prover and Preprocessing NIZKs from Diffie-Hellman Assumptions.
EUROCRYPT (2)
Shuichi Katsumata, Ryo Nishimaki, Shota Yamada, Takashi Yamakawa
2019 J jnl
Designated Verifier/Prover and Preprocessing NIZKs from Diffie-Hellman Assumptions.
IACR Cryptol. ePrint Arch.
Shuichi Katsumata, Ryo Nishimaki, Shota Yamada, Takashi Yamakawa
2019 — conf
Exploring Constructions of Compact NIZKs from Various Assumptions.
CRYPTO (3)
Shuichi Katsumata, Ryo Nishimaki, Shota Yamada, Takashi Yamakawa
2019 J jnl
Exploring Constructions of Compact NIZKs from Various Assumptions.
IACR Cryptol. ePrint Arch.
Shuichi Katsumata, Ryo Nishimaki, Shota Yamada, Takashi Yamakawa
2019 J jnl
Fast, Compact, and Expressive Attribute-Based Encryption.
IACR Cryptol. ePrint Arch.
Junichi Tomida, Yuto Kawahara, Ryo Nishimaki
2019 J jnl
How to Watermark Cryptographic Functions by Bilinear Maps.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Ryo Nishimaki
2019 — conf
Leakage-Resilient Identity-Based Encryption in Bounded Retrieval Model with Nearly Optimal Leakage-Ratio.
Public Key Cryptography (1)
Ryo Nishimaki, Takashi Yamakawa
2019 J jnl
Leakage-resilient Identity-based Encryption in Bounded Retrieval Model with Nearly Optimal Leakage-Ratio.
IACR Cryptol. ePrint Arch.
Ryo Nishimaki, Takashi Yamakawa
2018 J jnl
A Bit-fixing PRF with O(1) Collusion-Resistance from LWE.
IACR Cryptol. ePrint Arch.
Alex Davidson, Ryo Nishimaki
2018 J jnl
Adaptively Secure and Succinct Functional Encryption: Improving Security and Efficiency, Simultaneously.
IACR Cryptol. ePrint Arch.
Fuyuki Kitagawa, Ryo Nishimaki, Keisuke Tanaka, Takashi Yamakawa
2018 J jnl
Adaptively Single-Key Secure Constrained PRFs for NC1.
IACR Cryptol. ePrint Arch.
Nuttapong Attrapadung, Takahiro Matsuda, Ryo Nishimaki, Shota Yamada, Takashi Yamakawa
2018 J jnl
Constrained PRFs for Bit-fixing from OWFs with Constant Collusion Resistance.
IACR Cryptol. ePrint Arch.
Alex Davidson, Shuichi Katsumata, Ryo Nishimaki, Shota Yamada
2018 J jnl
Constrained PRFs for NC1 in Traditional Groups.
IACR Cryptol. ePrint Arch.
Nuttapong Attrapadung, Takahiro Matsuda, Ryo Nishimaki, Shota Yamada, Takashi Yamakawa
2018 — conf
Constrained PRFs for \mathrmNC^1 in Traditional Groups.
CRYPTO (2)
Nuttapong Attrapadung, Takahiro Matsuda, Ryo Nishimaki, Shota Yamada, Takashi Yamakawa
2018 — conf
Obfustopia Built on Secret-Key Functional Encryption.
EUROCRYPT (2)
Fuyuki Kitagawa, Ryo Nishimaki, Keisuke Tanaka
2018 — conf
Simple and Generic Constructions of Succinct Functional Encryption.
Public Key Cryptography (2)
Fuyuki Kitagawa, Ryo Nishimaki, Keisuke Tanaka
2018 J jnl
Universal Proxy Re-Encryption.
IACR Cryptol. ePrint Arch.
Nico Döttling, Ryo Nishimaki
2018 J jnl
Watermarking Cryptographic Capabilities.
SIAM J. Comput.
Aloni Cohen, Justin Holmgren, Ryo Nishimaki, Vinod Vaikuntanathan, Daniel Wichs
2017 — conf
Compact Structure-Preserving Signatures with Almost Tight Security.
CRYPTO (2)
Masayuki Abe, Dennis Hofheinz, Ryo Nishimaki, Miyako Ohkubo, Jiaxin Pan
2017 J jnl
Compact Structure-preserving Signatures with Almost Tight Security.
IACR Cryptol. ePrint Arch.
Masayuki Abe, Dennis Hofheinz, Ryo Nishimaki, Miyako Ohkubo, Jiaxin Pan
2017 J jnl
From Single-Key to Collusion-Resistant Secret-Key Functional Encryption by Leveraging Succinctness.
IACR Cryptol. ePrint Arch.
Fuyuki Kitagawa, Ryo Nishimaki, Keisuke Tanaka
2017 J jnl
Indistinguishability Obfuscation for All Circuits from Secret-Key Functional Encryption.
IACR Cryptol. ePrint Arch.
Fuyuki Kitagawa, Ryo Nishimaki, Keisuke Tanaka
2017 J jnl
Indistinguishability Obfuscation: Simpler Constructions using Secret-Key Functional Encryption.
IACR Cryptol. ePrint Arch.
Fuyuki Kitagawa, Ryo Nishimaki, Keisuke Tanaka
2016 — conf
Anonymous Traitor Tracing: How to Embed Arbitrary Information in a Key.
EUROCRYPT (2)
Ryo Nishimaki, Daniel Wichs, Mark Zhandry
2016 J jnl
Constant-Size Structure-Preserving Signatures: Generic Constructions and Simple Assumptions.
J. Cryptol.
Masayuki Abe, Melissa Chase, Bernardo David, Markulf Kohlweiss, Ryo Nishimaki, Miyako Ohkubo
2016 — conf
From Cryptomania to Obfustopia Through Secret-Key Functional Encryption.
TCC (B2)
Nir Bitansky, Ryo Nishimaki, Alain Passelègue, Daniel Wichs
2016 J jnl
From Cryptomania to Obfustopia through Secret-Key Functional Encryption.
IACR Cryptol. ePrint Arch.
Nir Bitansky, Ryo Nishimaki, Alain Passelègue, Daniel Wichs
2016 — conf
Watermarking Cryptographic Programs.
Mycrypt
Ryo Nishimaki
2016 A* conf
Watermarking cryptographic capabilities.
STOC
Aloni Cohen, Justin Holmgren, Ryo Nishimaki, Vinod Vaikuntanathan, Daniel Wichs
2015 J jnl
Anonymous Traitor Tracing: How to Embed Arbitrary Information in a Key.
IACR Cryptol. ePrint Arch.
Ryo Nishimaki, Daniel Wichs, Mark Zhandry
2015 — conf
Generalizing Efficient Multiparty Computation.
ICITS
Bernardo Machado David, Ryo Nishimaki, Samuel Ranellucci, Alain Tapp
2015 J jnl
Generalizing Efficient Multiparty Computation.
IACR Cryptol. ePrint Arch.
Bernardo David, Ryo Nishimaki, Samuel Ranellucci, Alain Tapp
2015 J jnl
Key-Private Proxy Re-Encryption from Lattices, Revisited.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Ryo Nishimaki, Keita Xagawa
2015 J jnl
Post-Challenge Leakage Resilient Public-Key Cryptosystem in Split State Model.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Eiichiro Fujisaki, Akinori Kawachi, Ryo Nishimaki, Keisuke Tanaka, Kenji Yasunaga
2015 J jnl
Re-encryption, functional re-encryption, and multi-hop re-encryption: A framework for achieving obfuscation-based security and instantiations from lattices.
IACR Cryptol. ePrint Arch.
Nishanth Chandran, Melissa Chase, Feng-Hao Liu, Ryo Nishimaki, Keita Xagawa
2015 J jnl
Tagged One-Time Signatures: Tight Security and Optimal Tag Size.
IACR Cryptol. ePrint Arch.
Masayuki Abe, Bernardo David, Markulf Kohlweiss, Ryo Nishimaki, Miyako Ohkubo
2015 J jnl
Verifiably Encrypted Signatures with Short Keys based on the Decisional Linear Problem and Obfuscation for Encrypted VES.
IACR Cryptol. ePrint Arch.
Ryo Nishimaki, Keita Xagawa
2015 J jnl
Verifiably encrypted signatures with short keys based on the decisional linear problem and obfuscation for encrypted VES.
Des. Codes Cryptogr.
Ryo Nishimaki, Keita Xagawa
2015 J jnl
Watermarking Cryptographic Capabilities.
IACR Cryptol. ePrint Arch.
Aloni Cohen, Justin Holmgren, Ryo Nishimaki, Vinod Vaikuntanathan, Daniel Wichs
2015 J jnl
Watermarking Cryptographic Programs Against Arbitrary Removal Strategies.
IACR Cryptol. ePrint Arch.
Ryo Nishimaki, Daniel Wichs
2014 J jnl
How to Watermark Cryptographic Functions.
IACR Cryptol. ePrint Arch.
Ryo Nishimaki
2014 — conf
Re-encryption, Functional Re-encryption, and Multi-hop Re-encryption: A Framework for Achieving Obfuscation-Based Security and Instantiations from Lattices.
Public Key Cryptography
Nishanth Chandran, Melissa Chase, Feng-Hao Liu, Ryo Nishimaki, Keita Xagawa
2013 A* conf
How to Watermark Cryptographic Functions.
EUROCRYPT
Ryo Nishimaki
2013 — conf
Tagged One-Time Signatures: Tight Security and Optimal Tag Size.
Public Key Cryptography
Masayuki Abe, Bernardo David, Markulf Kohlweiss, Ryo Nishimaki, Miyako Ohkubo
2013 — conf
Universally composable adaptive oblivious transfer (with access control) from standard assumptions.
Digital Identity Management
Masayuki Abe, Jan Camenisch, Maria Dubovitskaya, Ryo Nishimaki
2013 — conf
Verifiably Encrypted Signatures with Short Keys Based on the Decisional Linear Problem and Obfuscation for Encrypted VES.
Public Key Cryptography
Ryo Nishimaki, Keita Xagawa
2012 J jnl
A Multi-Trapdoor Commitment Scheme from the RSA Assumption.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Ryo Nishimaki, Eiichiro Fujisaki, Keisuke Tanaka
2012 J jnl
An Efficient Non-interactive Universally Composable String-Commitment Scheme.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Ryo Nishimaki, Eiichiro Fujisaki, Keisuke Tanaka
2012 A conf
Constant-Size Structure-Preserving Signatures: Generic Constructions and Simple Assumptions.
ASIACRYPT
Masayuki Abe, Melissa Chase, Bernardo David, Markulf Kohlweiss, Ryo Nishimaki, Miyako Ohkubo
2012 J jnl
Constant-Size Structure-Preserving Signatures: Generic Constructions and Simple Assumptions.
IACR Cryptol. ePrint Arch.
Masayuki Abe, Melissa Chase, Bernardo David, Markulf Kohlweiss, Ryo Nishimaki, Miyako Ohkubo
2010 Misc conf
A Multi-trapdoor Commitment Scheme from the RSA Assumption.
ACISP
Ryo Nishimaki, Eiichiro Fujisaki, Keisuke Tanaka
2010 — conf
CCA Proxy Re-Encryption without Bilinear Maps in the Standard Model.
Public Key Cryptography
Toshihide Matsuda, Ryo Nishimaki, Keisuke Tanaka
2009 C conf
Efficient Non-interactive Universally Composable String-Commitment Schemes.
ProvSec
Ryo Nishimaki, Eiichiro Fujisaki, Keisuke Tanaka
2009 C conf
On the Insecurity of the Fiat-Shamir Signatures with Iterative Hash Functions.
ProvSec
Eiichiro Fujisaki, Ryo Nishimaki, Keisuke Tanaka
2009 Misc conf
Security on Hybrid Encryption with the Tag-KEM/DEM Framework.
ACISP
Toshihide Matsuda, Ryo Nishimaki, Akira Numayama, Keisuke Tanaka
2008 J jnl
Universally Composable Identity-Based Encryption.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Ryo Nishimaki, Yoshifumi Manabe, Tatsuaki Okamoto
2006 — conf
Universally Composable Identity-Based Encryption.
VIETCRYPT
Ryo Nishimaki, Yoshifumi Manabe, Tatsuaki Okamoto