Kenji Koyama

According to our database, Kenji Koyama authored at least 24 papers between 1980 and 2012.

Collaborative distances:

• Dijkstra number of four.
• Erdős number of three.

2012

The changes in Japanese researchers' usage and perception of electronic resources: Result of SCREAL Survey 2011.

Yoshinori Sato, Shinji Mine, Hiroshi Itsumura, Syun Tutiya, Kenji Koyama, Keiko Kurata, Hiroya Takeuchi

Proceedings of the Information, Interaction, Innovation: Celebrating the Past, Constructing the Present and Creating the Future, 2012

2005

Acute triangles in triangulations on the plane with minimum degree at least 4.

Kenji Koyama, Atsuhiro Nakamoto

Discret. Math., 2005

Predictive rate control for realtime video streaming with network triggered handover.

Susumu Ishihara, Kenji Koyama, Goh Miyamoto, Masahiro Kuroda

Proceedings of the IEEE Wireless Communications and Networking Conference, 2005

2000

On searching for solutions of the Diophantine equation x³ + y³ +2z³ = n.

Kenji Koyama

Math. Comput., 2000

1999

Nonexistence conditions of a solution for the congruence x1^k + ... + xs^k = N (mod pⁿ).

Hiroshi Sekigawa, Kenji Koyama

Math. Comput., 1999

Modulus Search for Elliptic Curve Cryptosystems.

Kenji Koyama, Yukio Tsuruoka, Noboru Kunihiro

Proceedings of the Advances in Cryptology, 1999

1998

Temporal Differences in Eye and Mouth Movements Classifying Facial Expressions of Smiles.

Shuichi Nishio, Kenji Koyama, Toru Nakamura

Proceedings of the 3rd International Conference on Face & Gesture Recognition (FG '98), 1998

Equivalence of Counting the Number of Points on Elliptic Curve over the Ring Z_n and Factoring n.

Noboru Kunihiro, Kenji Koyama

Proceedings of the Advances in Cryptology - EUROCRYPT '98, International Conference on the Theory and Application of Cryptographic Techniques, Espoo, Finland, May 31, 1998

1997

On searching for solutions of the Diophantine equation x³ + y³ + z³ = n.

Kenji Koyama, Yukio Tsuruoka, Hiroshi Sekigawa

Math. Comput., 1997

An Augmented Family of Cryptographic Parity Circuits.

Kenji Koyama, Routo Terada

Proceedings of the Information Security, First International Workshop, 1997

1995

Fast RSA-type Schemes Based on Singular Cubic Curves y²+axy=m³(mod n).

Kenji Koyama

Proceedings of the Advances in Cryptology, 1995

1992

Secure Conference Key Distribution Schemes for Conspiracy Attack.

Kenji Koyama

Proceedings of the Advances in Cryptology, 1992

Speeding up Elliptic Cryptosystems by Using a Signed Binary Window Method.

Kenji Koyama, Yukio Tsuruoka

Proceedings of the Advances in Cryptology, 1992

1991

New Public-Key Schemes Based on Elliptic Curves over the Ring Z_n.

Kenji Koyama, Ueli M. Maurer, Tatsuaki Okamoto, Scott A. Vanstone

Proceedings of the Advances in Cryptology, 1991

A knowledge transfer model: From zero-knowledge to full-knowledge.

Yasuyuki Tsukada, Kenji Koyama

Proceedings of the Algorithmic Learning Theory, 2nd International Workshop, 1991

An interactive knowledge transfer model and analysis of "Mastermind" game.

Kenji Koyama, Tony W. Lai

Proceedings of the Algorithmic Learning Theory, 2nd International Workshop, 1991

1990

Identity-based conference key distribution systems.

Kenji Koyama, Kazuo Ohta

Syst. Comput. Jpn., 1990

Membership Authentication for Hierarchical Multigroups Using the Extended Fiat-Shamir Scheme.

Kazuo Ohta, Tatsuaki Okamoto, Kenji Koyama

Proceedings of the Advances in Cryptology, 1990

Nonlinear Parity Circuits and their Cryptographic Applications.

Kenji Koyama, Routo Terada

Proceedings of the Advances in Cryptology, 1990

Demonstrating Possession without Revealing Factors and its Application.

Hiroki Shizuya, Kenji Koyama, Toshiya Itoh

Proceedings of the Advances in Cryptology, 1990

Meet-in-the-Middle Attack on Digital Signature Schemes.

Kazuo Ohta, Kenji Koyama

Proceedings of the Advances in Cryptology, 1990

Direct Demonstration of the Power to Break Public-Key Cryptosystems.

Kenji Koyama

Proceedings of the Advances in Cryptology, 1990

1988

Security of Improved Identity-Based Conference Key Distribution Systems.

Kenji Koyama, Kazuo Ohta

Proceedings of the Advances in Cryptology, 1988

1980

An operating system kernel mechanism for the poly-processor system PPS-R.

Makoto Amamiya, Naohisa Takahashi, Yutaka Ogawa, Kenji Koyama

Proceedings of the American Federation of Information Processing Societies: 1980 National Computer Conference, 1980