Wakaha Ogata

	2009
41		Le Trieu Phong, Kaoru Kurosawa, Wakaha Ogata: New RSA-Based (Selectively) Convertible Undeniable Signature Schemes. AFRICACRYPT 2009: 116-134
40		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
39		Kouichi Itoh, Tetsuya Izu, Wakaha Ogata, Takeshi Shimoyama, Masahiko Takenaka: Forgery Attacks on Time-Stamp, Signed PDF and X.509 Certificate. IEICE Transactions 92-A(1): 67-75 (2009)
38		Kouichi Itoh, Dai Yamamoto, Jun Yajima, Wakaha Ogata: Collision-Based Power Attack for RSA with Small Public Exponent. IEICE Transactions 92-D(5): 897-908 (2009)
	2008
37		Isamu Teranishi, Wakaha Ogata: Relationship between Two Approaches for Defining the Standard Model PA-ness. ACISP 2008: 113-127
36		Le Trieu Phong, Hiroto Matsuoka, Wakaha Ogata: Stateful identity-based encryption scheme: faster encryption and decryption. ASIACCS 2008: 381-388
35		Hiroaki Kikuchi, Kei Nagai, Wakaha Ogata, Masakatsu Nishigaki: Privacy-Preserving Similarity Evaluation and Application to Remote Biometrics Authentication. MDAI 2008: 3-14
34		Isamu Teranishi, Wakaha Ogata: Cramer-Shoup Satisfies a Stronger Plaintext Awareness under a Weaker Assumption. SCN 2008: 109-125
33		Isamu Teranishi, Wakaha Ogata: Relationship between Standard Model Plaintext Awareness and Message Hiding. IEICE Transactions 91-A(1): 244-261 (2008)
32		Isamu Teranishi, Takuro Oyama, Wakaha Ogata: General Conversion for Obtaining Strongly Existentially Unforgeable Signatures. IEICE Transactions 91-A(1): 94-106 (2008)
	2007
31		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
30		Le Trieu Phong, Wakaha Ogata: On Some Variations of Kurosawa-Desmedt Public-Key Encryption Scheme. IEICE Transactions 90-A(1): 226-230 (2007)
29		Dai Yamamoto, Wakaha Ogata: A General Model of Structured Multisignatures with Message Flexibility. IEICE Transactions 90-A(1): 83-90 (2007)
28		Wakaha Ogata, Naoya Matsumoto: Comments on the Security Proofs of Some Signature Schemes Based on Factorization. IEICE Transactions 90-A(2): 526-530 (2007)
	2006
27		Isamu Teranishi, Wakaha Ogata: Relationship Between Standard Model Plaintext Awareness and Message Hiding. ASIACRYPT 2006: 226-240
26		Isamu Teranishi, Takuro Oyama, Wakaha Ogata: General Conversion for Obtaining Strongly Existentially Unforgeable Signatures. INDOCRYPT 2006: 191-205
25		Wakaha Ogata, Kaoru Kurosawa, Swee-Huay Heng: The security of the FDH variant of Chaum's undeniable signature scheme. IEEE Transactions on Information Theory 52(5): 2006-2017 (2006)
24		Wakaha Ogata, Kaoru Kurosawa, Douglas R. Stinson: Optimum Secret Sharing Scheme Secure against Cheating. SIAM J. Discrete Math. 20(1): 79-95 (2006)
	2005
23		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
22		Natsuki Ishida, Shin'ichiro Matsuo, Wakaha Ogata: Efficient Divisible Voting Scheme. IEICE Transactions 88-A(1): 230-238 (2005)
	2004
21		Wakaha Ogata, Kaoru Kurosawa, Douglas R. Stinson, Hajime Saido: New combinatorial designs and their applications to authentication codes and secret sharing schemes. Discrete Mathematics 279(1-3): 383-405 (2004)
20		Wakaha Ogata, Ryota Sasahara: k out of n Oblivious Transfer without Random Oracles. IEICE Transactions 87-A(1): 147-151 (2004)
19		Wakaha Ogata, Kaoru Kurosawa: Oblivious keyword search. J. Complexity 20(2-3): 356-371 (2004)
	2003
18		Natsuki Ishida, Shin'ichiro Matsuo, Wakaha Ogata: Divisible Voting Scheme. ISC 2003: 137-150
17		Shin'ichiro Matsuo, Wakaha Ogata: Brief announcement: a method for exchanging valuable data: how to realize matching oblivious transfer. PODC 2003: 201
	2002
16		Wakaha Ogata, Kaoru Kurosawa: Bounds for Robust Metering Schemes and Their Relationship with A-code. ASIACRYPT 2002: 64-80
15		Kaoru Kurosawa, Wakaha Ogata: Bit-Slice Auction Circuit. ESORICS 2002: 24-38
14		Wataru Kishimoto, Koji Okada, Kaoru Kurosawa, Wakaha Ogata: On the bound for anonymous secret sharing schemes. Discrete Applied Mathematics 121(1-3): 193-202 (2002)
	2001
13		Kaoru Kurosawa, Wakaha Ogata, Toshihiki Matsuo, Shuichi Makishima: IND-CCA Public Key Schemes Equivalent to Factoring n=pq. Public Key Cryptography 2001: 36-47
	2000
12		Wakaha Ogata, Kaoru Kurosawa: Provably Secure Metering Scheme. ASIACRYPT 2000: 388-398
	1999
11		Kaoru Kurosawa, Wakaha Ogata: Efficient Rabin-type Digital Signature Scheme. Des. Codes Cryptography 16(1): 53-64 (1999)
10		Carlo Blundo, Alfredo De Santis, Kaoru Kurosawa, Wakaha Ogata: On a Fallacious Bound for Authentication Codes. J. Cryptology 12(3): 155-159 (1999)
	1998
9		Wakaha Ogata, Kaoru Kurosawa: Some Basic Properties of General Nonperfect Secret Sharing Schemes. J. UCS 4(8): 690-704 (1998)
	1997
8		Wakaha Ogata, Kaoru Kurosawa, Kazue Sako, Kazunori Takatani: Fault tolerant anonymous channel. ICICS 1997: 440-444
	1996
7		Wakaha Ogata, Kaoru Kurosawa: Optimum Secret Sharing Scheme Secure against Cheating. EUROCRYPT 1996: 200-211
6		Wakaha Ogata, Keiichi Sakano, Kaoru Kurosawa: Multisymbol Majority Vote and Hard Core. Inf. Process. Lett. 58(6): 285-292 (1996)
	1995
5		Kaoru Kurosawa, Satoshi Obana, Wakaha Ogata: t-Cheater Identifiable (k, n) Threshold Secret Sharing Schemes. CRYPTO 1995: 410-423
	1993
4		Kaoru Kurosawa, Koji Okada, Keiichi Sakano, Wakaha Ogata, Shigeo Tsujii: Nonperfect Secret Sharing Schemes and Matroids. EUROCRYPT 1993: 126-141
	1992
3		Wakaha Ogata, Kaoru Kurosawa, Shigeo Tsujii: Nonperfect Secret Sharing Schemes. AUSCRYPT 1992: 56-66
	1991
2		Wakaha Ogata, Kaoru Kurosawa: On Claw Free Families. ASIACRYPT 1991: 111-123
	1990
1		Kaoru Kurosawa, Yutaka Katayama, Wakaha Ogata, Shigeo Tsujii: General Public Key Residue Cryptosystems and Mental Poker Protocols. EUROCRYPT 1990: 374-388

Coauthor Index

1	Carlo Blundo	[10]
2	Swee-Huay Heng	[23] [25]
3	Natsuki Ishida	[18] [22]
4	Kouichi Itoh	[38] [39]
5	Tetsuya Izu	[39]
6	Yutaka Katayama	[1]
7	Hiroaki Kikuchi	[31] [35] [40]
8	Wataru Kishimoto	[14]
9	Kaoru Kurosawa	[1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [19] [21] [23] [24] [25] [41]
10	Shuichi Makishima	[13]
11	Naoya Matsumoto	[28]
12	Shin'ichiro Matsuo	[17] [18] [22]
13	Toshihiki Matsuo	[13]
14	Hiroto Matsuoka	[36]
15	Kei Nagai	[31] [35]
16	Masakatsu Nishigaki	[31] [35] [40]
17	Satoshi Obana	[5]
18	Koji Okada	[4] [14]
19	Takuro Oyama	[26] [32]
20	Le Trieu Phong	[30] [36] [41]
21	Hajime Saido	[21]
22	Keiichi Sakano	[4] [6]
23	Taiki Sakashita	[40]
24	Kazue Sako	[8]
25	Alfredo De Santis	[10]
26	Ryota Sasahara	[20]
27	Yoichi Shibata	[40]
28	Takeshi Shimoyama	[39]
29	Douglas R. Stinson	[21] [24]
30	Kenta Takahashi	[40]
31	Kazunori Takatani	[8]
32	Masahiko Takenaka	[39]
33	Isamu Teranishi	[26] [27] [32] [33] [34] [37]
34	Shigeo Tsujii	[1] [3] [4]
35	Jun Yajima	[38]
36	Dai Yamamoto	[29] [38]
37	Takumi Yamamoto	[40]

Colors in the list of coauthors