Kenji Koyama - researchr alias

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2005

Acute triangles in triangulations on the plane with minimum degree at least 4Kenji Koyama, Atsuhiro Nakamoto. DM, 303(1-3):104-116, 2005. [doi]

2000

On searching for solutions of the Diophantine equation x:::3::: + y:::3::: +2z:::3::: = nKenji Koyama. moc, 69(232):1735-1742, 2000.

1999

Modulus Search for Elliptic Curve CryptosystemsKenji Koyama, Yukio Tsuruoka, Noboru Kunihiro. asiacrypt 1999: 1-7

Nonexistence conditions of a solution for the congruence x1:::k::: + ... + xs:::k::: = N (mod p:::n:::)Hiroshi Sekigawa, Kenji Koyama. moc, 68(227):1283-1297, 1999.

1998

Equivalence of Counting the Number of Points on Elliptic Curve over the Ring Z::n:: and Factoring nNoboru Kunihiro, Kenji Koyama. eurocrypt 1998: 47-58 [doi]

Temporal Differences in Eye and Mouth Movements Classifying Facial Expressions of SmilesShuichi Nishio, Kenji Koyama, Toru Nakamura. fgr 1998: 206-213

1997

On searching for solutions of the Diophantine equation x:::3::: + y:::3::: + z:::3::: = nKenji Koyama, Yukio Tsuruoka, Hiroshi Sekigawa. moc, 66(218):841-851, 1997.

An Augmented Family of Cryptographic Parity CircuitsKenji Koyama, Routo Terada. iiswc 1998: 198-208

1995

Fast RSA-type Schemes Based on Singular Cubic Curves y²+axy=m³(mod n)Kenji Koyama. eurocrypt 1995: 329-340 [doi]

1992

Speeding up Elliptic Cryptosystems by Using a Signed Binary Window MethodKenji Koyama, Yukio Tsuruoka. crypto 1993: 345-357 [doi]

Secure Conference Key Distribution Schemes for Conspiracy AttackKenji Koyama. eurocrypt 1992: 449-453 [doi]

1991

New Public-Key Schemes Based on Elliptic Curves over the Ring Z::n::Kenji Koyama, Ueli M. Maurer, Tatsuaki Okamoto, Scott A. Vanstone. crypto 1992: 252-266 [doi]

1990

1988

Security of Improved Identity-Based Conference Key Distribution SystemsKenji Koyama, Kazuo Ohta. eurocrypt 1988: 11-19 [doi]

1987

Identity-based Conference Key Distribution SystemsKenji Koyama, Kazuo Ohta. crypto 1988: 175-184 [doi]

1980

An operating system kernel mechanism for the poly-processor system PPS-RMakoto Amamiya, Naohisa Takahashi, Yutaka Ogawa, Kenji Koyama. afips 1980: 147-156 [doi]