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2020 – today
- 2024
[j43]Kota Takahashi, Keitaro Hashimoto
, Wakaha Ogata:
Chosen-ciphertext secure code-based threshold public key encryptions with short ciphertext. Des. Codes Cryptogr. 92(2): 277-301 (2024)- [c32]Xichen Zhang, Keitaro Hashimoto, Wakaha Ogata:
Security Model for Authenticated Key Exchange, Reconsidered. SCN (2) 2024: 251-271 - [i13]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: 1286 (2024) - 2023
- [j42]Atsunori Ichikawa, Wakaha Ogata:
Perfectly Secure Oblivious Priority Queue. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 106(3): 272-280 (2023) - 2022
- [j41]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. 105-A(3): 143-159 (2022) - [j40]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. 105-A(3): 203-213 (2022) - 2020
- [j39]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. 103-A(10): 1157-1166 (2020) - [j38]Wakaha Ogata, Takaaki Otemori:
Security analysis of secure kNN and ranked keyword search over encrypted data. Int. J. Inf. Sec. 19(4): 419-425 (2020) - [c31]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: 503-509
2010 – 2019
- 2019
- [j37]Wakaha Ogata, Kaoru Kurosawa:
No-Dictionary Searchable Symmetric Encryption. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 102-A(1): 114-124 (2019) - [j36]Keitaro Hashimoto, Wakaha Ogata:
Unrestricted and compact certificateless aggregate signature scheme. Inf. Sci. 487: 97-114 (2019) - [j35]Dan Yamamoto, Wakaha Ogata:
Multidivisible Online/Offline Cryptography and Its Application to Signcryptions. Secur. Commun. Networks 2019: 1042649:1-1042649:21 (2019) - [c30]Atsunori Ichikawa, Wakaha Ogata, Koki Hamada, Ryo Kikuchi:
Efficient Secure Multi-Party Protocols for Decision Tree Classification. ACISP 2019: 362-380 - [c29]Toi Tomita, Wakaha Ogata, Kaoru Kurosawa:
CCA-Secure Leakage-Resilient Identity-Based Key-Encapsulation from Simple (Not \mathtt q -type) Assumptions. IWSEC 2019: 3-22 - [i12]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: 982 (2019) - [i11]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: 1367 (2019) - 2017
- [j34]Dan Yamamoto, Wakaha Ogata:
Multi-Divisible On-Line/Off-Line Encryptions. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 100-A(1): 91-102 (2017) - [j33]Wakaha Ogata, Toshinori Araki:
Computationally Secure Verifiable Secret Sharing Scheme for Distributing Many Secrets. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 100-A(1): 103-114 (2017) - [j32]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): 287-293 (2017) - [c28]Wakaha Ogata, Kaoru Kurosawa:
Efficient No-dictionary Verifiable Searchable Symmetric Encryption. Financial Cryptography 2017: 498-516 - 2016
- [i10]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 abs/1607.00468 (2016) - [i9]Wakaha Ogata, Kaoru Kurosawa:
Efficient No-dictionary Verifiable SSE. IACR Cryptol. ePrint Arch. 2016: 981 (2016) - 2015
- [j31]Nguyen Quoc Viet, Wakaha Ogata:
Certificateless Aggregate Signature Schemes with Improved Security. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 98-A(1): 92-99 (2015) - [j30]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. 98-A(1): 213-222 (2015) - [c27]Shunsuke Taketani, Wakaha Ogata:
Improvement of UC Secure Searchable Symmetric Encryption Scheme. IWSEC 2015: 135-152 - 2014
- [j29]Wakaha Ogata, Hiroshi Eguchi:
Cheating detectable threshold scheme against most powerful cheaters for long secrets. Des. Codes Cryptogr. 71(3): 527-539 (2014) - 2013
- [j28]Wakaha Ogata, Toshinori Araki:
Cheating Detectable Secret Sharing Schemes for Random Bit Strings. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 96-A(11): 2230-2234 (2013) - [c26]Wakaha Ogata, Keita Koiwa, Akira Kanaoka, Shin'ichiro Matsuo:
Toward Practical Searchable Symmetric Encryption. IWSEC 2013: 151-167 - 2012
- [j27]Le Trieu Phong, Kaoru Kurosawa, Wakaha Ogata:
Undeniable and Unpretendable Signatures. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 95-A(1): 138-150 (2012) - 2011
- [j26]Tatsumi Oba, Wakaha Ogata:
Provably Secure On-Line Secret Sharing Scheme. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 94-A(1): 139-149 (2011) - [j25]Toshinori Araki, Wakaha Ogata:
A Simple and Efficient Secret Sharing Scheme Secure against Cheating. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 94-A(6): 1338-1345 (2011) - 2010
- [j24]Le Trieu Phong, Kaoru Kurosawa, Wakaha Ogata:
New RSA-Based (Selectively) Convertible Undeniable Signature Schemes. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 93-A(1): 63-75 (2010) - [j23]Toshinori Araki, Wakaha Ogata:
Efficient Almost Secure 1-Round Message Transmission Schemes for 3t+1 Channels. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 93-A(1): 126-135 (2010) - [j22]Hiroaki Kikuchi, Kei Nagai, Wakaha Ogata, Masakatsu Nishigaki:
Privacy-preserving similarity evaluation and application to remote biometrics authentication. Soft Comput. 14(5): 529-536 (2010) - [c25]Ryo Kikuchi, Le Trieu Phong, Wakaha Ogata:
A Framework for Constructing Convertible Undeniable Signatures. ProvSec 2010: 70-86 - [c24]Le Trieu Phong, Kaoru Kurosawa, Wakaha Ogata:
Provably Secure Convertible Undeniable Signatures with Unambiguity. SCN 2010: 291-308
2000 – 2009
- 2009
- [j21]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. 92-A(1): 67-75 (2009) - [j20]Kouichi Itoh, Dai Yamamoto, Jun Yajima, Wakaha Ogata:
Collision-Based Power Attack for RSA with Small Public Exponent. IEICE Trans. Inf. Syst. 92-D(5): 897-908 (2009) - [j19]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. 92-A(8): 1822-1835 (2009) - [c23]Le Trieu Phong, Kaoru Kurosawa, Wakaha Ogata:
New RSA-Based (Selectively) Convertible Undeniable Signature Schemes. AFRICACRYPT 2009: 116-134 - [c22]Taiki Sakashita, Yoichi Shibata, Takumi Yamamoto, Kenta Takahashi, Wakaha Ogata, Hiroaki Kikuchi, Masakatsu Nishigaki:
A Proposal of Efficient Remote Biometric Authentication Protocol. IWSEC 2009: 212-227 - [i8]Le Trieu Phong, Kaoru Kurosawa, Wakaha Ogata:
Provably Secure Convertible Undeniable Signatures with Unambiguity. IACR Cryptol. ePrint Arch. 2009: 394 (2009) - 2008
- [j18]Isamu Teranishi, Takuro Oyama, Wakaha Ogata:
General Conversion for Obtaining Strongly Existentially Unforgeable Signatures. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 91-A(1): 94-106 (2008) - [j17]Isamu Teranishi, Wakaha Ogata:
Relationship between Standard Model Plaintext Awareness and Message Hiding. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 91-A(1): 244-261 (2008) - [c21]Isamu Teranishi, Wakaha Ogata:
Relationship between Two Approaches for Defining the Standard Model PA-ness. ACISP 2008: 113-127 - [c20]Le Trieu Phong, Hiroto Matsuoka, Wakaha Ogata:
Stateful identity-based encryption scheme: faster encryption and decryption. AsiaCCS 2008: 381-388 - [c19]Hiroaki Kikuchi, Kei Nagai, Wakaha Ogata, Masakatsu Nishigaki:
Privacy-Preserving Similarity Evaluation and Application to Remote Biometrics Authentication. MDAI 2008: 3-14 - [c18]Isamu Teranishi, Wakaha Ogata:
Cramer-Shoup Satisfies a Stronger Plaintext Awareness under a Weaker Assumption. SCN 2008: 109-125 - [i7]Le Trieu Phong, Wakaha Ogata:
Blind HIBE and its Applications to Identity-Based Blind Signature and Blind Decryption. IACR Cryptol. ePrint Arch. 2008: 327 (2008) - 2007
- [j16]Dan Yamamoto, Wakaha Ogata:
A General Model of Structured Multisignatures with Message Flexibility. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 90-A(1): 83-90 (2007) - [j15]Le Trieu Phong, Wakaha Ogata:
On Some Variations of Kurosawa-Desmedt Public-Key Encryption Scheme. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 90-A(1): 226-230 (2007) - [j14]Wakaha Ogata, Naoya Matsumoto:
Comments on the Security Proofs of Some Signature Schemes Based on Factorization. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 90-A(2): 526-530 (2007) - [c17]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: 1155-1159 - 2006
- [j13]Wakaha Ogata, Kaoru Kurosawa, Douglas R. Stinson:
Optimum Secret Sharing Scheme Secure against Cheating. SIAM J. Discret. Math. 20(1): 79-95 (2006) - [j12]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): 2006-2017 (2006) - [c16]Isamu Teranishi, Wakaha Ogata:
Relationship Between Standard Model Plaintext Awareness and Message Hiding. ASIACRYPT 2006: 226-240 - [c15]Isamu Teranishi, Takuro Oyama, Wakaha Ogata:
General Conversion for Obtaining Strongly Existentially Unforgeable Signatures. INDOCRYPT 2006: 191-205 - [i6]Le Trieu Phong, Wakaha Ogata:
On a Variation of Kurosawa-Desmedt Encryption Scheme. IACR Cryptol. ePrint Arch. 2006: 31 (2006) - [i5]Le Trieu Phong, Wakaha Ogata:
Some Practical Public-Key Encryption Schemes in both Standard Model and Random Oracle Model. IACR Cryptol. ePrint Arch. 2006: 173 (2006) - 2005
- [j11]Natsuki Ishida, Shin'ichiro Matsuo, Wakaha Ogata:
Efficient Divisible Voting Scheme. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 88-A(1): 230-238 (2005) - [c14]Wakaha Ogata, Kaoru Kurosawa, Swee-Huay Heng:
The Security of the FDH Variant of Chaum's Undeniable Signature Scheme. Public Key Cryptography 2005: 328-345 - 2004
- [j10]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): 383-405 (2004) - [j9]Wakaha Ogata, Ryota Sasahara:
k out of n Oblivious Transfer without Random Oracles. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 87-A(1): 147-151 (2004) - [j8]Wakaha Ogata, Kaoru Kurosawa:
Oblivious keyword search. J. Complex. 20(2-3): 356-371 (2004) - [i4]Wakaha Ogata, Kaoru Kurosawa, Swee-Huay Heng:
The Security of the FDH Variant of Chaum's Undeniable Signature Scheme. IACR Cryptol. ePrint Arch. 2004: 290 (2004) - 2003
- [j7]Shin'ichiro Matsuo, Wakaha Ogata:
Electronic Ticket Scheme for ITS. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 86-A(1): 142-150 (2003) - [j6]Shin'ichiro Matsuo, Wakaha Ogata:
Matching Oblivious Transfer: How to Exchange Valuable Data. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 86-A(1): 189-193 (2003) - [c13]Natsuki Ishida, Shin'ichiro Matsuo, Wakaha Ogata:
Divisible Voting Scheme. ISC 2003: 137-150 - [c12]Shin'ichiro Matsuo, Wakaha Ogata:
Brief announcement: a method for exchanging valuable data: how to realize matching oblivious transfer. PODC 2003: 201 - [i3]Natsuki Ishida, Shin'ichiro Matsuo, Wakaha Ogata:
Divisible Voting Scheme. IACR Cryptol. ePrint Arch. 2003: 74 (2003) - 2002
- [j5]Wataru Kishimoto, Koji Okada, Kaoru Kurosawa, Wakaha Ogata:
On the bound for anonymous secret sharing schemes. Discret. Appl. Math. 121(1-3): 193-202 (2002) - [c11]Wakaha Ogata, Kaoru Kurosawa:
Bounds for Robust Metering Schemes and Their Relationship with A-code. ASIACRYPT 2002: 64-80 - [c10]Kaoru Kurosawa, Wakaha Ogata:
Bit-Slice Auction Circuit. ESORICS 2002: 24-38 - [i2]Wakaha Ogata, Kaoru Kurosawa:
Oblivious Keyword Search. IACR Cryptol. ePrint Arch. 2002: 182 (2002) - [i1]Kaoru Kurosawa, Wakaha Ogata:
Bit-Slice Auction Circuit. IACR Cryptol. ePrint Arch. 2002: 189 (2002) - 2001
- [c9]Kaoru Kurosawa, Wakaha Ogata, Toshihiko Matsuo, Shuichi Makishima:
IND-CCA Public Key Schemes Equivalent to Factoring n=pq. Public Key Cryptography 2001: 36-47 - 2000
- [c8]Wakaha Ogata, Kaoru Kurosawa:
Provably Secure Metering Scheme. ASIACRYPT 2000: 388-398
1990 – 1999
- 1999
- [j4]Kaoru Kurosawa, Wakaha Ogata:
Efficient Rabin-type Digital Signature Scheme. Des. Codes Cryptogr. 16(1): 53-64 (1999) - [j3]Carlo Blundo, Alfredo De Santis, Kaoru Kurosawa, Wakaha Ogata:
On a Fallacious Bound for Authentication Codes. J. Cryptol. 12(3): 155-159 (1999) - 1998
- [j2]Wakaha Ogata, Kaoru Kurosawa:
Some Basic Properties of General Nonperfect Secret Sharing Schemes. J. Univers. Comput. Sci. 4(8): 690-704 (1998) - 1997
- [c7]Wakaha Ogata, Kaoru Kurosawa, Kazue Sako, Kazunori Takatani:
Fault tolerant anonymous channel. ICICS 1997: 440-444 - 1996
- [j1]Wakaha Ogata, Keiichi Sakano, Kaoru Kurosawa:
Multisymbol Majority Vote and Hard Core. Inf. Process. Lett. 58(6): 285-292 (1996) - [c6]Wakaha Ogata, Kaoru Kurosawa:
Optimum Secret Sharing Scheme Secure against Cheating. EUROCRYPT 1996: 200-211 - 1995
- [c5]Kaoru Kurosawa, Satoshi Obana, Wakaha Ogata:
t-Cheater Identifiable (k, n) Threshold Secret Sharing Schemes. CRYPTO 1995: 410-423 - 1993
- [c4]Kaoru Kurosawa, Koji Okada, Keiichi Sakano, Wakaha Ogata, Shigeo Tsujii:
Nonperfect Secret Sharing Schemes and Matroids. EUROCRYPT 1993: 126-141 - 1992
- [c3]Wakaha Ogata, Kaoru Kurosawa, Shigeo Tsujii:
Nonperfect Secret Sharing Schemes. AUSCRYPT 1992: 56-66 - 1991
- [c2]Wakaha Ogata, Kaoru Kurosawa:
On Claw Free Families. ASIACRYPT 1991: 111-123 - 1990
- [c1]Kaoru Kurosawa, Yutaka Katayama, Wakaha Ogata, Shigeo Tsujii:
General Public Key Residue Cryptosystems and Mental Poker Protocols. EUROCRYPT 1990: 374-388
Coauthor Index
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