Wakaha Ogata

Publication Activity (10 Years)

Years Active: 1990-2024
Publications (10 Years): 21

Top Topics

Top Venues

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

IACR Cryptol. ePrint Arch.

Des. Codes Cryptogr.

Publications

Kota Takahashi, Keitaro Hashimoto, Wakaha Ogata
Chosen-ciphertext secure code-based threshold public key encryptions with short ciphertext. Des. Codes Cryptogr. 92 (2) (2024)
Hirofumi Yoshioka, Wakaha Ogata, Keitaro Hashimoto
Towards a Tightly Secure Signature in Multi-User Setting with Corruptions Based on Search Assumptions. IACR Cryptol. ePrint Arch. 2024 (2024)
Atsunori Ichikawa, Wakaha Ogata
Perfectly Secure Oblivious Priority Queue. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 106 (3) (2023)
Yoshifumi Saito, Wakaha Ogata
Private Decision Tree Evaluation by a Single Untrusted Server for Machine Learnig as a Service. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (3) (2022)
Toi Tomita, Wakaha Ogata, Kaoru Kurosawa
Boosting CPA to CCA2 for Leakage-Resilient Attribute-Based Encryption by Using New QA-NIZK. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (3) (2022)
Wakaha Ogata, Takaaki Otemori
Security analysis of secure kNN and ranked keyword search over encrypted data. Int. J. Inf. Sec. 19 (4) (2020)
Koki Mukaihira, Yasuyoshi Jinno, Takashi Tsuchiya, Tetsushi Ohki, Kenta Takahashi, Wakaha Ogata, Masakatsu Nishigaki
Communication Protocol Between Humans and Bank Server Secure Against Man-in-the-Browser Attacks. IHSI (2020)
Toi Tomita, Wakaha Ogata, Kaoru Kurosawa, Ryo Kuwayama
CCA-Secure Leakage-Resilient Identity-Based Encryption without q-Type Assumptions. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (10) (2020)
Wakaha Ogata, Kaoru Kurosawa
No-Dictionary Searchable Symmetric Encryption. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2019)
Toi Tomita, Wakaha Ogata, Kaoru Kurosawa
CCA-Secure Leakage-Resilient Identity-Based Key-Encapsulation from Simple (Not \mathtt q -type) Assumptions. IWSEC (2019)
Atsunori Ichikawa, Wakaha Ogata, Koki Hamada, Ryo Kikuchi
Efficient Secure Multi-Party Protocols for Decision Tree Classification. ACISP (2019)
Keitaro Hashimoto, Wakaha Ogata
Unrestricted and compact certificateless aggregate signature scheme. Inf. Sci. 487 (2019)
Keitaro Hashimoto, Wakaha Ogata, Toi Tomita
Tight reduction for generic construction of certificateless signature and its instantiation from DDH assumption. IACR Cryptol. ePrint Arch. 2019 (2019)
Dan Yamamoto, Wakaha Ogata
Multidivisible Online/Offline Cryptography and Its Application to Signcryptions. Secur. Commun. Networks 2019 (2019)
Toi Tomita, Wakaha Ogata, Kaoru Kurosawa, Ryo Kuwayama
CCA-Secure Leakage-Resilient Identity-Based Key-Encapsulation from Simple (not $\mathtt{q}$-type) Assumptions. IACR Cryptol. ePrint Arch. 2019 (2019)
Wakaha Ogata, Kaoru Kurosawa
Efficient No-dictionary Verifiable Searchable Symmetric Encryption. Financial Cryptography (2017)
Wakaha Ogata, Toshinori Araki
Computationally Secure Verifiable Secret Sharing Scheme for Distributing Many Secrets. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2017)
Ryo Kikuchi, Dai Ikarashi, Koji Chida, Koki Hamada, Wakaha Ogata
Computational SS and conversion protocols in both active and passive settings. IET Inf. Secur. 11 (5) (2017)
Dan Yamamoto, Wakaha Ogata
Multi-Divisible On-Line/Off-Line Encryptions. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2017)
Mikio Fujiwara, Atsushi Waseda, Ryo Nojima, Shiho Moriai, Wakaha Ogata, Masahide Sasaki
Unbreakable distributed storage with quantum key distribution network and password-authenticated secret sharing. CoRR (2016)
Wakaha Ogata, Kaoru Kurosawa
Efficient No-dictionary Verifiable SSE. IACR Cryptol. ePrint Arch. 2016 (2016)
Shunsuke Taketani, Wakaha Ogata
Improvement of UC Secure Searchable Symmetric Encryption Scheme. IWSEC (2015)
Nguyen Quoc Viet, Wakaha Ogata
Certificateless Aggregate Signature Schemes with Improved Security. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2015)
Ryo Kikuchi, Koji Chida, Dai Ikarashi, Wakaha Ogata, Koki Hamada, Katsumi Takahashi
Secret Sharing with Share-Conversion: Achieving Small Share-Size and Extendibility to Multiparty Computation. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2015)
Wakaha Ogata, Hiroshi Eguchi
Cheating detectable threshold scheme against most powerful cheaters for long secrets. Des. Codes Cryptogr. 71 (3) (2014)
Wakaha Ogata, Toshinori Araki
Cheating Detectable Secret Sharing Schemes for Random Bit Strings. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (11) (2013)
Wakaha Ogata, Keita Koiwa, Akira Kanaoka, Shin'ichiro Matsuo
Toward Practical Searchable Symmetric Encryption. IWSEC (2013)
Le Trieu Phong, Kaoru Kurosawa, Wakaha Ogata
Undeniable and Unpretendable Signatures. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2012)
Tatsumi Oba, Wakaha Ogata
Provably Secure On-Line Secret Sharing Scheme. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2011)
Toshinori Araki, Wakaha Ogata
A Simple and Efficient Secret Sharing Scheme Secure against Cheating. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (6) (2011)
Hiroaki Kikuchi, Kei Nagai, Wakaha Ogata, Masakatsu Nishigaki
Privacy-preserving similarity evaluation and application to remote biometrics authentication. Soft Comput. 14 (5) (2010)
Toshinori Araki, Wakaha Ogata
Efficient Almost Secure 1-Round Message Transmission Schemes for 3t+1 Channels. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2010)
Ryo Kikuchi, Le Trieu Phong, Wakaha Ogata
A Framework for Constructing Convertible Undeniable Signatures. ProvSec (2010)
Le Trieu Phong, Kaoru Kurosawa, Wakaha Ogata
Provably Secure Convertible Undeniable Signatures with Unambiguity. SCN (2010)
Le Trieu Phong, Kaoru Kurosawa, Wakaha Ogata
New RSA-Based (Selectively) Convertible Undeniable Signature Schemes. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2010)
Taiki Sakashita, Yoichi Shibata, Takumi Yamamoto, Kenta Takahashi, Wakaha Ogata, Hiroaki Kikuchi, Masakatsu Nishigaki
A Proposal of Efficient Remote Biometric Authentication Protocol. IWSEC (2009)
Le Trieu Phong, Kaoru Kurosawa, Wakaha Ogata
Provably Secure Convertible Undeniable Signatures with Unambiguity. IACR Cryptol. ePrint Arch. 2009 (2009)
Kouichi Itoh, Dai Yamamoto, Jun Yajima, Wakaha Ogata
Collision-Based Power Attack for RSA with Small Public Exponent. IEICE Trans. Inf. Syst. (5) (2009)
Kouichi Itoh, Tetsuya Izu, Wakaha Ogata, Takeshi Shimoyama, Masahiko Takenaka
Forgery Attacks on Time-Stamp, Signed PDF and X.509 Certificate. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2009)
Le Trieu Phong, Wakaha Ogata
New Identity-Based Blind Signature and Blind Decryption Scheme in the Standard Model. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (8) (2009)
Le Trieu Phong, Kaoru Kurosawa, Wakaha Ogata
New RSA-Based (Selectively) Convertible Undeniable Signature Schemes. AFRICACRYPT (2009)
Le Trieu Phong, Wakaha Ogata
Blind HIBE and its Applications to Identity-Based Blind Signature and Blind Decryption. IACR Cryptol. ePrint Arch. 2008 (2008)
Le Trieu Phong, Hiroto Matsuoka, Wakaha Ogata
Stateful identity-based encryption scheme: faster encryption and decryption. AsiaCCS (2008)
Isamu Teranishi, Wakaha Ogata
Relationship between Standard Model Plaintext Awareness and Message Hiding. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2008)
Hiroaki Kikuchi, Kei Nagai, Wakaha Ogata, Masakatsu Nishigaki
Privacy-Preserving Similarity Evaluation and Application to Remote Biometrics Authentication. MDAI (2008)
Isamu Teranishi, Wakaha Ogata
Cramer-Shoup Satisfies a Stronger Plaintext Awareness under a Weaker Assumption. SCN (2008)
Isamu Teranishi, Wakaha Ogata
Relationship between Two Approaches for Defining the Standard Model PA-ness. ACISP (2008)
Isamu Teranishi, Takuro Oyama, Wakaha Ogata
General Conversion for Obtaining Strongly Existentially Unforgeable Signatures. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2008)
Wakaha Ogata, Naoya Matsumoto
Comments on the Security Proofs of Some Signature Schemes Based on Factorization. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (2) (2007)
Kei Nagai, Hiroaki Kikuchi, Wakaha Ogata, Masakatsu Nishigaki
ZeroBio - Evaluation and Development of Asymmetric Fingerprint Authentication System Using Oblivious Neural Network Evaluation Protocol. ARES (2007)
Dan Yamamoto, Wakaha Ogata
A General Model of Structured Multisignatures with Message Flexibility. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2007)
Le Trieu Phong, Wakaha Ogata
On Some Variations of Kurosawa-Desmedt Public-Key Encryption Scheme. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2007)
Isamu Teranishi, Wakaha Ogata
Relationship Between Standard Model Plaintext Awareness and Message Hiding. ASIACRYPT (2006)
Wakaha Ogata, Kaoru Kurosawa, Swee-Huay Heng
The security of the FDH variant of Chaum's undeniable signature scheme. IEEE Trans. Inf. Theory 52 (5) (2006)
Le Trieu Phong, Wakaha Ogata
Some Practical Public-Key Encryption Schemes in both Standard Model and Random Oracle Model. IACR Cryptol. ePrint Arch. 2006 (2006)
Le Trieu Phong, Wakaha Ogata
On a Variation of Kurosawa-Desmedt Encryption Scheme. IACR Cryptol. ePrint Arch. 2006 (2006)
Isamu Teranishi, Takuro Oyama, Wakaha Ogata
General Conversion for Obtaining Strongly Existentially Unforgeable Signatures. INDOCRYPT (2006)
Wakaha Ogata, Kaoru Kurosawa, Douglas R. Stinson
Optimum Secret Sharing Scheme Secure against Cheating. SIAM J. Discret. Math. 20 (1) (2006)
Wakaha Ogata, Kaoru Kurosawa, Swee-Huay Heng
The Security of the FDH Variant of Chaum's Undeniable Signature Scheme. Public Key Cryptography (2005)
Natsuki Ishida, Shin'ichiro Matsuo, Wakaha Ogata
Efficient Divisible Voting Scheme. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2005)
Wakaha Ogata, Ryota Sasahara
k out of n Oblivious Transfer without Random Oracles. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2004)
Wakaha Ogata, Kaoru Kurosawa
Oblivious keyword search. J. Complex. 20 (2-3) (2004)
Wakaha Ogata, Kaoru Kurosawa, Douglas R. Stinson, Hajime Saido
New combinatorial designs and their applications to authentication codes and secret sharing schemes. Discret. Math. 279 (1-3) (2004)
Wakaha Ogata, Kaoru Kurosawa, Swee-Huay Heng
The Security of the FDH Variant of Chaum's Undeniable Signature Scheme. IACR Cryptol. ePrint Arch. 2004 (2004)
Shin'ichiro Matsuo, Wakaha Ogata
Electronic Ticket Scheme for ITS. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2003)
Shin'ichiro Matsuo, Wakaha Ogata
Brief announcement: a method for exchanging valuable data: how to realize matching oblivious transfer. PODC (2003)
Shin'ichiro Matsuo, Wakaha Ogata
Matching Oblivious Transfer: How to Exchange Valuable Data. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2003)
Natsuki Ishida, Shin'ichiro Matsuo, Wakaha Ogata
Divisible Voting Scheme. IACR Cryptol. ePrint Arch. 2003 (2003)
Natsuki Ishida, Shin'ichiro Matsuo, Wakaha Ogata
Divisible Voting Scheme. ISC (2003)
Wakaha Ogata, Kaoru Kurosawa
Oblivious Keyword Search. IACR Cryptol. ePrint Arch. 2002 (2002)
Kaoru Kurosawa, Wakaha Ogata
Bit-Slice Auction Circuit. IACR Cryptol. ePrint Arch. 2002 (2002)
Wakaha Ogata, Kaoru Kurosawa
Bounds for Robust Metering Schemes and Their Relationship with A-code. ASIACRYPT (2002)
Wataru Kishimoto, Koji Okada, Kaoru Kurosawa, Wakaha Ogata
On the bound for anonymous secret sharing schemes. Discret. Appl. Math. 121 (1-3) (2002)
Kaoru Kurosawa, Wakaha Ogata
Bit-Slice Auction Circuit. ESORICS (2002)
Kaoru Kurosawa, Wakaha Ogata, Toshihiko Matsuo, Shuichi Makishima
IND-CCA Public Key Schemes Equivalent to Factoring n=pq. Public Key Cryptography (2001)
Wakaha Ogata, Kaoru Kurosawa
Provably Secure Metering Scheme. ASIACRYPT (2000)
Carlo Blundo, Alfredo De Santis, Kaoru Kurosawa, Wakaha Ogata
On a Fallacious Bound for Authentication Codes. J. Cryptol. 12 (3) (1999)
Kaoru Kurosawa, Wakaha Ogata
Efficient Rabin-type Digital Signature Scheme. Des. Codes Cryptogr. 16 (1) (1999)
Wakaha Ogata, Kaoru Kurosawa
Some Basic Properties of General Nonperfect Secret Sharing Schemes. J. Univers. Comput. Sci. 4 (8) (1998)
Wakaha Ogata, Kaoru Kurosawa, Kazue Sako, Kazunori Takatani
Fault tolerant anonymous channel. ICICS (1997)
Wakaha Ogata, Keiichi Sakano, Kaoru Kurosawa
Multisymbol Majority Vote and Hard Core. Inf. Process. Lett. 58 (6) (1996)
Wakaha Ogata, Kaoru Kurosawa
Optimum Secret Sharing Scheme Secure against Cheating. EUROCRYPT (1996)
Kaoru Kurosawa, Satoshi Obana, Wakaha Ogata
t-Cheater Identifiable (k, n) Threshold Secret Sharing Schemes. CRYPTO (1995)
Kaoru Kurosawa, Koji Okada, Keiichi Sakano, Wakaha Ogata, Shigeo Tsujii
Nonperfect Secret Sharing Schemes and Matroids. EUROCRYPT (1993)
Wakaha Ogata, Kaoru Kurosawa, Shigeo Tsujii
Nonperfect Secret Sharing Schemes. AUSCRYPT (1992)
Wakaha Ogata, Kaoru Kurosawa
On Claw Free Families. ASIACRYPT (1991)
Kaoru Kurosawa, Yutaka Katayama, Wakaha Ogata, Shigeo Tsujii
General Public Key Residue Cryptosystems and Mental Poker Protocols. EUROCRYPT (1990)