Takeshi Nakai

22 papers B 2C 3Journal 12Unranked 5
YearRankTypeTitle / Venue / Authors
2026 J jnl
Fair Exchange based on Smart Contract: A Generalization of FairSwap and OptiSwap.
Int. J. Inf. Sec.
Takaya Kondo, Takeshi Nakai, Koutarou Suzuki
2025 B conf
Secure Computation with Penalties, Revisited: How to Handle Coins with Various Colors.
CT-RSA
Takeshi Nakai
2024 J jnl
Card-Based Protocols for Private Set Intersection and Union.
New Gener. Comput.
Anastasiia Doi, Tomoki Ono, Yoshiki Abe, Takeshi Nakai, Kazumasa Shinagawa, Yohei Watanabe, Koji Nuida, Mitsugu Iwamoto
2024 J jnl
Card-based Cryptography with a Standard Deck of Cards, Revisited: Efficient Protocols in the Private Model.
New Gener. Comput.
Takeshi Nakai, Keita Iwanari, Tomoki Ono, Yoshiki Abe, Yohei Watanabe, Mitsugu Iwamoto
2024 J jnl
Secure multi-party computation with legally-enforceable fairness.
Int. J. Inf. Sec.
Takeshi Nakai, Kazumasa Shinagawa
2023 J jnl
A Computationally Efficient Card-Based Majority Voting Protocol with Fewer Cards in the Private Model.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Yoshiki Abe, Takeshi Nakai, Yohei Watanabe, Mitsugu Iwamoto, Kazuo Ohta
2023 — conf
Constant-Deposit Multiparty Lotteries on Bitcoin for Arbitrary Number of Players and Winners.
ICISC (2)
Shun Uchizono, Takeshi Nakai, Yohei Watanabe, Mitsugu Iwamoto
2023 J jnl
Constant-round linear-broadcast secure computation with penalties.
Theor. Comput. Sci.
Takeshi Nakai, Kazumasa Shinagawa
2023 C conf
Secure Multi-party Computation with Legally-Enforceable Fairness.
ICICS
Takeshi Nakai, Kazumasa Shinagawa
2023 — conf
Single-Shuffle Card-Based Protocols with Six Cards per Gate.
ICISC (2)
Tomoki Ono, Kazumasa Shinagawa, Takeshi Nakai, Yohei Watanabe, Mitsugu Iwamoto
2023 — conf
The Two Sheriffs Problem: Cryptographic Formalization and Generalization.
COCOA (1)
Kota Sugimoto, Takeshi Nakai, Yohei Watanabe, Mitsugu Iwamoto
2022 C conf
An Improvement of Multi-Party Private Set Intersection Based on Oblivious Programmable PRFs.
ISITA
Seiya Shimizu, Takeshi Nakai, Yohei Watanabe, Mitsugu Iwamoto
2022 C conf
Card-based Cryptographic Protocols for Private Set Intersection.
ISITA
Anastasiia Doi, Tomoki Ono, Takeshi Nakai, Kazumasa Shinagawa, Yohei Watanabe, Koji Nuida, Mitsugu Iwamoto
2022 J jnl
Constant-Round Linear-Broadcast Secure Computation with Penalties.
CoRR
Takeshi Nakai, Kazumasa Shinagawa
2022 J jnl
Efficient Card-Based Majority Voting Protocols.
New Gener. Comput.
Yoshiki Abe, Takeshi Nakai, Yoshihisa Kuroki, Shinnosuke Suzuki, Yuta Koga, Yohei Watanabe, Mitsugu Iwamoto, Kazuo Ohta
2022 J jnl
How to Make a Secure Index for Searchable Symmetric Encryption, Revisited.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Yohei Watanabe, Takeshi Nakai, Kazuma Ohara, Takuya Nojima, Yexuan Liu, Mitsugu Iwamoto, Kazuo Ohta
2022 J jnl
Secure Computation for Threshold Functions with Physical Cards: Power of Private Permutations.
New Gener. Comput.
Takeshi Nakai, Satoshi Shirouchi, Yuuki Tokushige, Mitsugu Iwamoto, Kazuo Ohta
2021 J jnl
How to Make a Secure Index for Searchable Symmetric Encryption, Revisited.
IACR Cryptol. ePrint Arch.
Yohei Watanabe, Takeshi Nakai, Kazuma Ohara, Takuya Nojima, Yexuan Liu, Mitsugu Iwamoto, Kazuo Ohta
2021 J jnl
How to Solve Millionaires' Problem with Two Kinds of Cards.
New Gener. Comput.
Takeshi Nakai, Yuto Misawa, Yuuki Tokushige, Mitsugu Iwamoto, Kazuo Ohta
2021 — conf
Secure Computation with Non-Equivalent Penalties in Constant Rounds.
Tokenomics
Takeshi Nakai, Kazumasa Shinagawa
2017 — conf
Four Cards Are Sufficient for a Card-Based Three-Input Voting Protocol Utilizing Private Permutations.
ICITS
Takeshi Nakai, Satoshi Shirouchi, Mitsugu Iwamoto, Kazuo Ohta
2016 B conf
Efficient Card-Based Cryptographic Protocols for Millionaires' Problem Utilizing Private Permutations.
CANS
Takeshi Nakai, Yuuki Tokushige, Yuto Misawa, Mitsugu Iwamoto, Kazuo Ohta