2026 Kazuo Ohta: Computer Science Researcher – H-Index, Publications & Awards

Discipline name	D-Index	World Ranking	Current World Ranking	National Ranking	Current National Ranking	Publications	Citations
Computer Science	37	10533	10236	158	150	262	8425

Discipline name

D-Index

World Ranking

Current World Ranking

National Ranking

Current National Ranking

Publications

Citations

Computer Science

10533

10236

158

150

262

8425

Overview

Kazuo Ohta is affiliated with the University of Electro-Communications in Japan. Their research primarily spans the fields of computer science and engineering with a focus on several subfields including artificial intelligence, electrical and electronic engineering, computational theory and mathematics, information systems, and computer vision and pattern recognition.

The scientist's work covers a range of topics, notably:

Cryptography and Data Security
Complexity and Algorithms in Graphs
Graph theory and CDMA systems
Internet Traffic Analysis and Secure E-voting
Cryptography and Residue Arithmetic
Chaos-based Image/Signal Encryption
Advanced Authentication Protocols Security

Kazuo Ohta has contributed to key publication venues, predominantly:

IEICE Transactions on Fundamentals of Electronics Communications and Computer Sciences
New Generation Computing

Among recent papers associated with Ohta's research are:

"How to Solve Millionaires' Problem with Two Kinds of Cards," 2021, published in New Generation Computing
"Secure Computation for Threshold Functions with Physical Cards: Power of Private Permutations," 2022, published in New Generation Computing
"Efficient Card-Based Majority Voting Protocols," 2022, published in New Generation Computing
"Achieving Pairing-Free Aggregate Signatures using Pre-Communication between Signers," 2021, published in IEICE Transactions on Fundamentals of Electronics Communications and Computer Sciences
"How to Make a Secure Index for Searchable Symmetric Encryption, Revisited," 2022, published in IEICE Transactions on Fundamentals of Electronics Communications and Computer Sciences

Frequent collaborators in their research include Mitsugu Iwamoto, Takeshi Nakai, Yohei Watanabe, Kaoru Takemure, and Yusuke Sakai, reflecting ongoing teamwork across related research topics and publications.

Best Publications

A Practical Secret Voting Scheme for Large Scale Elections

Atsushi Fujioka;Tatsuaki Okamoto;Kazuo Ohta

1400
Citations
Universal Electronic Cash

Tatsuaki Okamoto;Kazuo Ohta

662
Citations
Attribute-based encryption with partially hidden encryptor-specified access structures

Takashi Nishide;Kazuki Yoneyama;Kazuo Ohta

535
Citations
Accountable-Subgroup Multisignatures

Silvio Micali;Kazuo Ohta;Leonid Reyzin

352
Citations
Multiparty computation for interval, equality, and comparison without bit-decomposition protocol

Takashi Nishide;Kazuo Ohta

311
Citations
Accountable-subgroup multisignatures: extended abstract

Silvio Micali;Kazuo Ohta;Leonid Reyzin

307
Citations
Fault sensitivity analysis

Yang Li;Kazuo Sakiyama;Shigeto Gomisawa;Toshinori Fukunaga

293
Citations
A Digital Multisignature Scheme Based on the Fiat-Shamir Scheme

Kazuo Ohta;Tatsuaki Okamoto

213
Citations
Disposable Zero-Knowledge Authentications and Their Applications to Untraceable Electronic Cash

Tatsuaki Okamoto;Kazuo Ohta

190
Citations
A modification of the Fiat-Shamir scheme

Kazuo Ohta;Tatsuaki Okamoto

176
Citations
Multi-Signature Schemes Secure against Active Insider Attacks

Kazuo Ohta;Tatsuaki Okamoto

176
Citations
On Concrete Security Treatment of Signatures Derived from Identification

Kazuo Ohta;Tatsuaki Okamoto

168
Citations
Electronic cash system

Tatsuaki Okamoto;Kazuo Ohta

161
Citations
Divertible zero knowledge interactive proofs and commutative random self-reducibility

Tatsuaki Okamoto;Kazuo Ohta

126
Citations
Identity-based Conference Key Distribution Systems

Kenji Koyama;Kazuo Ohta

118
Citations
Authentication system and apparatus therefor

Kazuo Ohta;Tatsuaki Okamoto

97
Citations
On the power of fault sensitivity analysis and collision side-channel attacks in a combined setting

Amir Moradi;Oliver Mischke;Christof Paar;Yang Li

95
Citations
Method and apparatus for implementing traceable electronic cash

Masayuki Abe;Atsushi Fujioka;Eiichiro Fujisaki;Kazuo Ohta

89
Citations
How to simultaneously exchange secrets by general assumptions

Tatsuaki Okamoto;Kazuo Ohta

88
Citations
Information-Theoretic Approach to Optimal Differential Fault Analysis

K. Sakiyama;Y. Li;K. Ohta;M. Iwamoto

87
Citations

Frequent Co-Authors

Tatsuaki Okamoto NTT (Japan)

Yu Sasaki NTT (Japan)

Lei Wang Shanghai Jiao Tong University

Takafumi Aoki Tohoku University

Ingrid Verbauwhede KU Leuven

Jean-Luc Danger Télécom ParisTech

Leonid Reyzin Boston University

Silvio Micali MIT

Masayuki Abe Kyoto University

Kaoru Kurosawa Ibaraki University

External Links

Personal website of Kazuo Ohta Google Scholar page

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