Efficient Sealed-Bid Auctions for Massive Numbers of Bidders with Lump Comparison. - Koji Chida; Kunio Kobayashi; Hikaru Morita (ISC, 2001)

A New Factoring Method of Integers N=pr ✕ q for Large r. - Koji Chida; Shigenori Uchiyama; Taiichi Saito (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2002)

An Auction Protocol Preserving Privacy of Losing Bids with a Secure Value Comparison Scheme. - Koji Chida; Kunio Kobayashi; Hikaru Morita (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2004)

DECIDE: a scheme for decentralized identity escrow. - Noburou Taniguchi; Koji Chida; Osamu Shionoiri; Atsushi Kanai (Digital Identity Management, 2005)

Efficient, Non-optimistic Secure Circuit Evaluation Based on the ElGamal Encryption. - Go Yamamoto; Koji Chida; Anderson C. A. Nascimento; Koutarou Suzuki; Shigenori Uchiyama (WISA, 2005)

Flexible-Routing Anonymous Networks Using Optimal Length of Ciphertext. - Koji Chida; Masayuki Abe (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2005)

Conversion Schemes for Unlinkable Signatures That Include Revocable Unlinkability. - Koji Chida (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2006)

Efficient Multiparty Computation for Comparator Networks. - Koji Chida; Hiroaki Kikuchi; Gembu Morohashi; Keiichi Hirota (ARES, 2007)

Batch Processing of Interactive Proofs. - Koji Chida; Go Yamamoto (CT-RSA, 2007)

Secure Anonymous Communications with Practical Anonymity Revocation Scheme. - Koji Chida; Osamu Shionoiri; Atsushi Kanai (IWSEC, 2007)

Non-optimistic Secure Circuit Evaluation Based on ElGamal Encryption and Its Applications. - Koji Chida; Go Yamamoto; Koutarou Suzuki; Shigenori Uchiyama; Noburou Taniguchi; Osamu Shionoiri; Atsushi Kanai (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2007)

Privacy Preserving Computations without Public Key Cryptographic Operation. - Koji Chida; Katsumi Takahashi (IWSEC, 2008)

Batch Processing for Proofs of Partial Knowledge and Its Applications. - Koji Chida; Go Yamamoto (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2008)

Secure Multiparty Computation for Comparator Networks. - Gembu Morohashi; Koji Chida; Keiichi Hirota; Hiroaki Kikuchi (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2008)

Multiparty Computation from El Gamal/Paillier Conversion. - Koji Chida; Hiroaki Kikuchi; Keiichi Hirota; Gembu Morohashi (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2009)

Tag-Based Secure Set-Intersection Protocol and Its Application to Privacy-Enhancing Biometrics. - Koji Chida; Dai Ikarashi; Katsumi Takahashi (NBiS, 2010)

Practically Efficient Multi-party Sorting Protocols from Comparison Sort Algorithms. - Koki Hamada; Ryo Kikuchi; Dai Ikarashi; Koji Chida; Katsumi Takahashi (ICISC, 2012)

Secret Sharing Schemes with Conversion Protocol to Achieve Short Share-Size and Extendibility to Multiparty Computation. - Ryo Kikuchi; Koji Chida; Dai Ikarashi; Koki Hamada; Katsumi Takahashi (ACISP, 2013)

Oblivious Radix Sort: An Efficient Sorting Algorithm for Practical Secure Multi-party Computation. - Koki Hamada; Dai Ikarashi; Koji Chida; Katsumi Takahashi (IACR Cryptol. ePrint Arch., 2014)

Actively Private and Correct MPC Scheme in t<n/2 from Passively Secure Schemes with Small Overhead. - Dai Ikarashi; Ryo Kikuchi; Koki Hamada; Koji Chida (IACR Cryptol. ePrint Arch., 2014)

Practical Password-Based Authentication Protocol for Secret Sharing Based Multiparty Computation. - Ryo Kikuchi; Koji Chida; Dai Ikarashi; Koki Hamada (CANS, 2015)

k-Anonymous Microdata Release via Post Randomisation Method. - Dai Ikarashi; Ryo Kikuchi; Koji Chida; Katsumi Takahashi (IWSEC, 2015)

Secret Sharing with Share-Conversion: Achieving Small Share-Size and Extendibility to Multiparty Computation. - Ryo Kikuchi; Koji Chida; Dai Ikarashi; Wakaha Ogata; Koki Hamada; Katsumi Takahashi (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2015)

Adaptively and Unconditionally Secure Conversion Protocols between Ramp and Linear Secret Sharing. - Ryo Kikuchi; Dai Ikarashi; Koki Hamada; Koji Chida (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2015)

Evaluation of Secure Computation in a Distributed Healthcare Setting. - Eizen Kimura; Koki Hamada; Ryo Kikuchi; Koji Chida; Kazuya Okamoto; Shirou Manabe; Tomohiro Kuroda; Yasushi Matsumura; Toshihiro Takeda; Naoki Mihara (MIE, 2016)

Evaluation of the Anonymity and Utility of De-Identified Clinical Data Based on Japanese Anonymization Criteria. - Eizen Kimura; Satoshi Hasegawa; Koji Chida; Shoko Gamo; Satoshi Irino; Haku Ishida; Yukio Kurihara (MedInfo, 2017)

Computational SS and conversion protocols in both active and passive settings. - Ryo Kikuchi; Dai Ikarashi; Koji Chida; Koki Hamada; Wakaha Ogata (IET Inf. Secur., 2017)

High-Throughput Secure AES Computation. - Koji Chida; Koki Hamada; Dai Ikarashi; Ryo Kikuchi; Benny Pinkas (WAHC@CCS, 2018)

Efficient Bit-Decomposition and Modulus-Conversion Protocols with an Honest Majority. - Ryo Kikuchi; Dai Ikarashi; Takahiro Matsuda 002; Koki Hamada; Koji Chida (IACR Cryptol. ePrint Arch., 2018)

Password-Based Authentication Protocol for Secret-Sharing-Based Multiparty Computation. - Ryo Kikuchi; Koji Chida; Dai Ikarashi; Koki Hamada (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2018)

An Efficient Secure Three-Party Sorting Protocol with an Honest Majority. - Koji Chida; Koki Hamada; Dai Ikarashi; Ryo Kikuchi; Naoto Kiribuchi; Benny Pinkas (IACR Cryptol. ePrint Arch., 2019)

Private Intersection-Weighted-Sum. - Koji Chida; Koki Hamada; Atsunori Ichikawa; Masanobu Kii; Junichi Tomida (IACR Cryptol. ePrint Arch., 2022)

Communication-Efficient Inner Product Private Join and Compute with Cardinality. - Koji Chida; Koki Hamada; Atsunori Ichikawa; Masanobu Kii; Junichi Tomida (AsiaCCS, 2023)

Extended km-Anonymity for Randomization Applied to Binary Data. - Masaya Kobayashi; Atsushi Fujioka; Koji Chida (PST, 2023)

On Rényi Differential Privacy in Statistics-based Synthetic Data Generation. - Takayuki Miura; Toshiki Shibahara; Masanobu Kii; Atsunori Ichikawa; Juko Yamamoto; Koji Chida (J. Inf. Process., 2023)

Efficient decision tree training with new data structure for secure multi-party computation. - Koki Hamada; Dai Ikarashi; Ryo Kikuchi; Koji Chida (Proc. Priv. Enhancing Technol., 2023)

Fast Large-Scale Honest-Majority MPC for Malicious Adversaries. - Koji Chida; Koki Hamada; Dai Ikarashi; Ryo Kikuchi; Daniel Genkin; Yehuda Lindell; Ariel Nof (J. Cryptol., 2023)

$k^{m}$-Anonymization Meets Differential Privacy Under Sampling. - Masaya Kobayashi; Atsushi Fujioka; Koji Chida; Akira Nagai; Kan Yasuda (ISITA, 2024)

A Study on Anonymization Through Participation in iPWS Cup 2023. - Kabuto Okajima; Koji Chida (IWSEC, 2024)

Experimental Evaluation for Risk Assessment of Privacy Preserving Synthetic Data. - Koji Chida; Susumu Kakuta; Hiroyuki Itakura; Ichiro Ishihara; Kosuke Yoshioka; Hiroshi Takeuchi (MDAI, 2024)

Pk-Anonymization Meets Differential Privacy. - Masaya Kobayashi; Atsushi Fujioka; Koji Chida; Akira Nagai; Kan Yasuda (PST, 2024)

Block Hijacking Attack: Impact Evaluation on Liquid Network and Design Insights for Blockchain-based Scaling Solutions. - Kabuto Okajima; Shin'ichiro Matsuo; Koji Chida (ICBC, 2025)