Wakaha Ogata

According to our database, Wakaha Ogata authored at least 78 papers between 1990 and 2024.

Collaborative distances:

• Dijkstra number of four.
• Erdős number of two.

2024

Chosen-ciphertext secure code-based threshold public key encryptions with short ciphertext.

Kota Takahashi, Keitaro Hashimoto, Wakaha Ogata

Des. Codes Cryptogr., February, 2024

Towards a Tightly Secure Signature in Multi-User Setting with Corruptions Based on Search Assumptions.

Hirofumi Yoshioka, Wakaha Ogata, Keitaro Hashimoto

IACR Cryptol. ePrint Arch., 2024

Security Model for Authenticated Key Exchange, Reconsidered.

Xichen Zhang, Keitaro Hashimoto, Wakaha Ogata

Proceedings of the Security and Cryptography for Networks - 14th International Conference, 2024

2023

Perfectly Secure Oblivious Priority Queue.

Atsunori Ichikawa, Wakaha Ogata

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., March, 2023

2022

Boosting CPA to CCA2 for Leakage-Resilient Attribute-Based Encryption by Using New QA-NIZK.

Toi Tomita, Wakaha Ogata, Kaoru Kurosawa

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2022

Private Decision Tree Evaluation by a Single Untrusted Server for Machine Learnig as a Service.

Yoshifumi Saito, Wakaha Ogata

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2022

2020

Security analysis of secure kNN and ranked keyword search over encrypted data.

Wakaha Ogata, Takaaki Otemori

Int. J. Inf. Sec., 2020

CCA-Secure Leakage-Resilient Identity-Based Encryption without q-Type Assumptions.

Toi Tomita, Wakaha Ogata, Kaoru Kurosawa, Ryo Kuwayama

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2020

Communication Protocol Between Humans and Bank Server Secure Against Man-in-the-Browser Attacks.

Koki Mukaihira, Yasuyoshi Jinno, Takashi Tsuchiya, Tetsushi Ohki, Kenta Takahashi, Wakaha Ogata, Masakatsu Nishigaki

Proceedings of the Intelligent Human Systems Integration 2020, 2020

2019

Multidivisible Online/Offline Cryptography and Its Application to Signcryptions.

Dan Yamamoto, Wakaha Ogata

Secur. Commun. Networks, 2019

Unrestricted and compact certificateless aggregate signature scheme.

Keitaro Hashimoto, Wakaha Ogata

Inf. Sci., 2019

No-Dictionary Searchable Symmetric Encryption.

Wakaha Ogata, Kaoru Kurosawa

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2019

CCA-Secure Leakage-Resilient Identity-Based Key-Encapsulation from Simple (not $\mathtt{q}$-type) Assumptions.

Toi Tomita, Wakaha Ogata, Kaoru Kurosawa, Ryo Kuwayama

IACR Cryptol. ePrint Arch., 2019

Tight reduction for generic construction of certificateless signature and its instantiation from DDH assumption.

Keitaro Hashimoto, Wakaha Ogata, Toi Tomita

IACR Cryptol. ePrint Arch., 2019

CCA-Secure Leakage-Resilient Identity-Based Key-Encapsulation from Simple (Not \mathtt q -type) Assumptions.

Toi Tomita, Wakaha Ogata, Kaoru Kurosawa

Proceedings of the Advances in Information and Computer Security, 2019

Efficient Secure Multi-Party Protocols for Decision Tree Classification.

Atsunori Ichikawa, Wakaha Ogata, Koki Hamada, Ryo Kikuchi

Proceedings of the Information Security and Privacy - 24th Australasian Conference, 2019

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

Multi-Divisible On-Line/Off-Line Encryptions.

Dan Yamamoto, Wakaha Ogata

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2017

Computationally Secure Verifiable Secret Sharing Scheme for Distributing Many Secrets.

Wakaha Ogata, Toshinori Araki

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2017

Efficient No-dictionary Verifiable Searchable Symmetric Encryption.

Wakaha Ogata, Kaoru Kurosawa

Proceedings of the Financial Cryptography and Data Security, 2017

2016

Efficient No-dictionary Verifiable SSE.

Wakaha Ogata, Kaoru Kurosawa

IACR Cryptol. ePrint Arch., 2016

Unbreakable distributed storage with quantum key distribution network and password-authenticated secret sharing.

Mikio Fujiwara, Atsushi Waseda, Ryo Nojima, Shiho Moriai, Wakaha Ogata, Masahide Sasaki

CoRR, 2016

2015

Certificateless Aggregate Signature Schemes with Improved Security.

Nguyen Quoc Viet, Wakaha Ogata

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 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

Improvement of UC Secure Searchable Symmetric Encryption Scheme.

Shunsuke Taketani, Wakaha Ogata

Proceedings of the Advances in Information and Computer Security, 2015

2014

Cheating detectable threshold scheme against most powerful cheaters for long secrets.

Wakaha Ogata, Hiroshi Eguchi

Des. Codes Cryptogr., 2014

2013

Cheating Detectable Secret Sharing Schemes for Random Bit Strings.

Wakaha Ogata, Toshinori Araki

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2013

Toward Practical Searchable Symmetric Encryption.

Wakaha Ogata, Keita Koiwa, Akira Kanaoka, Shin'ichiro Matsuo

Proceedings of the Advances in Information and Computer Security, 2013

2012

Undeniable and Unpretendable Signatures.

Le Trieu Phong, Kaoru Kurosawa, Wakaha Ogata

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2012

2011

Provably Secure On-Line Secret Sharing Scheme.

Tatsumi Oba, Wakaha Ogata

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2011

A Simple and Efficient Secret Sharing Scheme Secure against Cheating.

Toshinori Araki, Wakaha Ogata

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2011

2010

Privacy-preserving similarity evaluation and application to remote biometrics authentication.

Hiroaki Kikuchi, Kei Nagai, Wakaha Ogata, Masakatsu Nishigaki

Soft Comput., 2010

New RSA-Based (Selectively) Convertible Undeniable Signature Schemes.

Le Trieu Phong, Kaoru Kurosawa, Wakaha Ogata

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2010

Efficient Almost Secure 1-Round Message Transmission Schemes for 3t+1 Channels.

Toshinori Araki, Wakaha Ogata

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2010

A Framework for Constructing Convertible Undeniable Signatures.

Ryo Kikuchi, Le Trieu Phong, Wakaha Ogata

Proceedings of the Provable Security - 4th International Conference, 2010

2009

New Identity-Based Blind Signature and Blind Decryption Scheme in the Standard Model.

Le Trieu Phong, Wakaha Ogata

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2009

Collision-Based Power Attack for RSA with Small Public Exponent.

Kouichi Itoh, Dai Yamamoto, Jun Yajima, Wakaha Ogata

IEICE Trans. Inf. Syst., 2009

Forgery Attacks on Time-Stamp, Signed PDF and X.509 Certificate.

Kouichi Itoh, Tetsuya Izu, Wakaha Ogata, Takeshi Shimoyama, Masahiko Takenaka

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2009

Provably Secure Convertible Undeniable Signatures with Unambiguity.

Le Trieu Phong, Kaoru Kurosawa, Wakaha Ogata

IACR Cryptol. ePrint Arch., 2009

A Proposal of Efficient Remote Biometric Authentication Protocol.

Taiki Sakashita, Yoichi Shibata, Takumi Yamamoto, Kenta Takahashi, Wakaha Ogata, Hiroaki Kikuchi, Masakatsu Nishigaki

Proceedings of the Advances in Information and Computer Security, 2009

2008

General Conversion for Obtaining Strongly Existentially Unforgeable Signatures.

Isamu Teranishi, Takuro Oyama, Wakaha Ogata

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2008

Relationship between Standard Model Plaintext Awareness and Message Hiding.

Isamu Teranishi, Wakaha Ogata

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2008

Blind HIBE and its Applications to Identity-Based Blind Signature and Blind Decryption.

Le Trieu Phong, Wakaha Ogata

IACR Cryptol. ePrint Arch., 2008

Cramer-Shoup Satisfies a Stronger Plaintext Awareness under a Weaker Assumption.

Isamu Teranishi, Wakaha Ogata

Proceedings of the Security and Cryptography for Networks, 6th International Conference, 2008

Stateful identity-based encryption scheme: faster encryption and decryption.

Le Trieu Phong, Hiroto Matsuoka, Wakaha Ogata

Proceedings of the 2008 ACM Symposium on Information, Computer and Communications Security, 2008

Relationship between Two Approaches for Defining the Standard Model PA-ness.

Isamu Teranishi, Wakaha Ogata

Proceedings of the Information Security and Privacy, 13th Australasian Conference, 2008

2007

A General Model of Structured Multisignatures with Message Flexibility.

Dan Yamamoto, Wakaha Ogata

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2007

On Some Variations of Kurosawa-Desmedt Public-Key Encryption Scheme.

Le Trieu Phong, Wakaha Ogata

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2007

Comments on the Security Proofs of Some Signature Schemes Based on Factorization.

Wakaha Ogata, Naoya Matsumoto

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2007

ZeroBio - Evaluation and Development of Asymmetric Fingerprint Authentication System Using Oblivious Neural Network Evaluation Protocol.

Kei Nagai, Hiroaki Kikuchi, Wakaha Ogata, Masakatsu Nishigaki

Proceedings of the The Second International Conference on Availability, 2007

2006

The security of the FDH variant of Chaum's undeniable signature scheme.

Wakaha Ogata, Kaoru Kurosawa, Swee-Huay Heng

IEEE Trans. Inf. Theory, 2006

Optimum Secret Sharing Scheme Secure against Cheating.

Wakaha Ogata, Kaoru Kurosawa, Douglas R. Stinson

SIAM J. Discret. Math., 2006

Some Practical Public-Key Encryption Schemes in both Standard Model and Random Oracle Model.

Le Trieu Phong, Wakaha Ogata

IACR Cryptol. ePrint Arch., 2006

On a Variation of Kurosawa-Desmedt Encryption Scheme.

Le Trieu Phong, Wakaha Ogata

IACR Cryptol. ePrint Arch., 2006

2005

Efficient Divisible Voting Scheme.

Natsuki Ishida, Shin'ichiro Matsuo, Wakaha Ogata

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2005

2004

Oblivious keyword search.

Wakaha Ogata, Kaoru Kurosawa

J. Complex., 2004

k out of n Oblivious Transfer without Random Oracles.

Wakaha Ogata, Ryota Sasahara

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2004

New combinatorial designs and their applications to authentication codes and secret sharing schemes.

Wakaha Ogata, Kaoru Kurosawa, Douglas R. Stinson, Hajime Saido

Discret. Math., 2004

2003

Matching Oblivious Transfer: How to Exchange Valuable Data.

Shin'ichiro Matsuo, Wakaha Ogata

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2003

Electronic Ticket Scheme for ITS.

Shin'ichiro Matsuo, Wakaha Ogata

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2003

Divisible Voting Scheme.

Natsuki Ishida, Shin'ichiro Matsuo, Wakaha Ogata

IACR Cryptol. ePrint Arch., 2003

Brief announcement: a method for exchanging valuable data: how to realize matching oblivious transfer.

Shin'ichiro Matsuo, Wakaha Ogata

Proceedings of the Twenty-Second ACM Symposium on Principles of Distributed Computing, 2003

2002

Bit-Slice Auction Circuit.

Kaoru Kurosawa, Wakaha Ogata

IACR Cryptol. ePrint Arch., 2002

On the bound for anonymous secret sharing schemes.

Wataru Kishimoto, Koji Okada, Kaoru Kurosawa, Wakaha Ogata

Discret. Appl. Math., 2002

Bounds for Robust Metering Schemes and Their Relationship with A-code.

Wakaha Ogata, Kaoru Kurosawa

Proceedings of the Advances in Cryptology, 2002

2001

IND-CCA Public Key Schemes Equivalent to Factoring n=pq.

Kaoru Kurosawa, Wakaha Ogata, Toshihiko Matsuo, Shuichi Makishima

Proceedings of the Public Key Cryptography, 2001

2000

Provably Secure Metering Scheme.

Wakaha Ogata, Kaoru Kurosawa

Proceedings of the Advances in Cryptology, 2000

1999

On a Fallacious Bound for Authentication Codes.

Carlo Blundo, Alfredo De Santis, Kaoru Kurosawa, Wakaha Ogata

J. Cryptol., 1999

Efficient Rabin-type Digital Signature Scheme.

Kaoru Kurosawa, Wakaha Ogata

Des. Codes Cryptogr., 1999

1998

Some Basic Properties of General Nonperfect Secret Sharing Schemes.

Wakaha Ogata, Kaoru Kurosawa

J. Univers. Comput. Sci., 1998

1997

Fault tolerant anonymous channel.

Wakaha Ogata, Kaoru Kurosawa, Kazue Sako, Kazunori Takatani

Proceedings of the Information and Communication Security, First International Conference, 1997

1996

Multisymbol Majority Vote and Hard Core.

Wakaha Ogata, Keiichi Sakano, Kaoru Kurosawa

Inf. Process. Lett., 1996

Optimum Secret Sharing Scheme Secure against Cheating.

Wakaha Ogata, Kaoru Kurosawa

Proceedings of the Advances in Cryptology, 1996

1995

t-Cheater Identifiable (k, n) Threshold Secret Sharing Schemes.

Kaoru Kurosawa, Satoshi Obana, Wakaha Ogata

Proceedings of the Advances in Cryptology, 1995

1993

Nonperfect Secret Sharing Schemes and Matroids.

Kaoru Kurosawa, Koji Okada, Keiichi Sakano, Wakaha Ogata, Shigeo Tsujii

Proceedings of the Advances in Cryptology, 1993

1992

Nonperfect Secret Sharing Schemes.

Wakaha Ogata, Kaoru Kurosawa, Shigeo Tsujii

Proceedings of the Advances in Cryptology, 1992

1991

On Claw Free Families.

Wakaha Ogata, Kaoru Kurosawa

Proceedings of the Advances in Cryptology, 1991

1990

General Public Key Residue Cryptosystems and Mental Poker Protocols.

Kaoru Kurosawa, Yutaka Katayama, Wakaha Ogata, Shigeo Tsujii

Proceedings of the Advances in Cryptology, 1990