Kenji Koyama

2005
20	EE	Kenji Koyama, Atsuhiro Nakamoto: Acute triangles in triangulations on the plane with minimum degree at least 4. Discrete Mathematics 303(1-3): 104-116 (2005)
2000
19		Kenji Koyama: On searching for solutions of the Diophantine equation x3 + y3 +2z3 = n. Math. Comput. 69(232): 1735-1742 (2000)
1999
18		Kenji Koyama, Yukio Tsuruoka, Noboru Kunihiro: Modulus Search for Elliptic Curve Cryptosystems. ASIACRYPT 1999: 1-7
17		Hiroshi Sekigawa, Kenji Koyama: Nonexistence conditions of a solution for the congruence x1k + ... + xsk = N (mod pn). Math. Comput. 68(227): 1283-1297 (1999)
1998
16	EE	Noboru Kunihiro, Kenji Koyama: Equivalence of Counting the Number of Points on Elliptic Curve over the Ring Zn and Factoring n. EUROCRYPT 1998: 47-58
15		Shuichi Nishio, Kenji Koyama, Toru Nakamura: Temporal Differences in Eye and Mouth Movements Classifying Facial Expressions of Smiles. FG 1998: 206-213
1997
14		Kenji Koyama, Routo Terada: An Augmented Family of Cryptographic Parity Circuits. ISW 1997: 198-208
13		Kenji Koyama, Yukio Tsuruoka, Hiroshi Sekigawa: On searching for solutions of the Diophantine equation x3 + y3 + z3 = n. Math. Comput. 66(218): 841-851 (1997)
1995
12	EE	Kenji Koyama: Fast RSA-type Schemes Based on Singular Cubic Curves y²+axy=m³(mod n). EUROCRYPT 1995: 329-340
1992
11	EE	Kenji Koyama, Yukio Tsuruoka: Speeding up Elliptic Cryptosystems by Using a Signed Binary Window Method. CRYPTO 1992: 345-357
10	EE	Kenji Koyama: Secure Conference Key Distribution Schemes for Conspiracy Attack. EUROCRYPT 1992: 449-453
1991
9	EE	Kenji Koyama, Ueli M. Maurer, Tatsuaki Okamoto, Scott A. Vanstone: New Public-Key Schemes Based on Elliptic Curves over the Ring Zn. CRYPTO 1991: 252-266
1990
8		Kenji Koyama: Direct Demonstration of the Power to Break Public-Key Cryptosystems. AUSCRYPT 1990: 14-21
7		Kazuo Ohta, Kenji Koyama: Meet-in-the-Middle Attack on Digital Signature Schemes. AUSCRYPT 1990: 140-154
6		Hiroki Shizuya, Kenji Koyama, Toshiya Itoh: Demonstrating Possession without Revealing Factors and its Application. AUSCRYPT 1990: 273-293
5	EE	Kenji Koyama, Routo Terada: Nonlinear Parity Circuits and their Cryptographic Applications. CRYPTO 1990: 582-600
4	EE	Kazuo Ohta, Tatsuaki Okamoto, Kenji Koyama: Membership Authentication for Hierarchical Multigroups Using the Extended Fiat-Shamir Scheme. EUROCRYPT 1990: 446-457
1988
3	EE	Kenji Koyama, Kazuo Ohta: Security of Improved Identity-Based Conference Key Distribution Systems. EUROCRYPT 1988: 11-19
1987
2	EE	Kenji Koyama, Kazuo Ohta: Identity-based Conference Key Distribution Systems. CRYPTO 1987: 175-184
1980
1	EE	Makoto Amamiya, Naohisa Takahashi, Yutaka Ogawa, Kenji Koyama: An operating system kernel mechanism for the poly-processor system PPS-R. AFIPS National Computer Conference 1980: 147-156

Coauthor Index

1	Makoto Amamiya	[1]
2	Toshiya Itoh	[6]
3	Noboru Kunihiro	[16] [18]
4	Ueli M. Maurer	[9]
5	Atsuhiro Nakamoto	[20]
6	Toru Nakamura	[15]
7	Shuichi Nishio	[15]
8	Yutaka Ogawa	[1]
9	Kazuo Ohta	[2] [3] [4] [7]
10	Tatsuaki Okamoto	[4] [9]
11	Hiroshi Sekigawa	[13] [17]
12	Hiroki Shizuya	[6]
13	Naohisa Takahashi	[1]
14	Routo Terada	[5] [14]
15	Yukio Tsuruoka	[11] [13] [18]
16	Scott A. Vanstone	[9]

Colors in the list of coauthors