Koji Okada

According to our database, Koji Okada authored at least 17 papers between 1980 and 2020.

Collaborative distances:

• Dijkstra number of four.
• Erdős number of two.

2020

Proposal of a Method Extracting Strategic Phrases from Japanese Enterprise Disclosure Documents.

Shu Kawanami, Ken Hidema, Koji Okada

Proceedings of the 9th International Congress on Advanced Applied Informatics, 2020

2018

Proposal of a Method to Understand and Model Dynamic Mechanisms Existing in Business Context.

Koji Okada, Hayato Nishizono, Kosuke Tsubouchi, Tatsuya Hirukawa

Proceedings of the 7th International Congress on Advanced Applied Informatics, 2018

2017

Estimation of Risk Countermeasure Effects Based Upon Project-Behavior Simulation System.

Ayaka Oshima, Koji Okada

Proceedings of the 6th IIAI International Congress on Advanced Applied Informatics, 2017

2011

Unforgeability of Re-Encryption Keys against Collusion Attack in Proxy Re-Encryption.

Ryotaro Hayashi, Tatsuyuki Matsushita, Takuya Yoshida, Yoshihiro Fujii, Koji Okada

Proceedings of the Advances in Information and Computer Security, 2011

2008

Simple and Efficient Group Signature Scheme Assuming Tamperproof Devices.

Takuya Yoshida, Koji Okada

Proceedings of the Advances in Information and Computer Security, 2008

2002

On the bound for anonymous secret sharing schemes.

Wataru Kishimoto, Koji Okada, Kaoru Kurosawa, Wakaha Ogata

Discret. Appl. Math., 2002

2000

MDS secret-sharing scheme secure against cheaters.

Koji Okada, Kaoru Kurosawa

IEEE Trans. Inf. Theory, 2000

1998

New Combinatorial Bounds for Authentication Codes and Key Predistribution Schemes.

Kaoru Kurosawa, Koji Okada, Hajime Saido, Douglas R. Stinson

Des. Codes Cryptogr., 1998

1996

Combinatorial Lower Bounds for Secret Sharing Schemes.

Kaoru Kurosawa, Koji Okada

Inf. Process. Lett., 1996

1995

Low Exponent Attack Against Elliptic Curve RSA.

Kaoru Kurosawa, Koji Okada, Shigeo Tsujii

Inf. Process. Lett., 1995

1994

Lower Bound on the Size of Shares of Nonperfect Secret Sharing Schemes.

Koji Okada, Kaoru Kurosawa

Proceedings of the Advances in Cryptology - ASIACRYPT '94, 4th International Conference on the Theory and Applications of Cryptology, Wollongong, Australia, November 28, 1994

Security of the Center in Key Distribution Schemes.

Kaoru Kurosawa, Koji Okada, Keiichi Sakano

Proceedings of the Advances in Cryptology - ASIACRYPT '94, 4th International Conference on the Theory and Applications of Cryptology, Wollongong, Australia, November 28, 1994

Combinatorial Interpretation of Secret Sharing Schemes.

Kaoru Kurosawa, Koji Okada

Proceedings of the Advances in Cryptology - ASIACRYPT '94, 4th International Conference on the Theory and Applications of Cryptology, Wollongong, Australia, November 28, 1994

1993

Nonperfect Secret Sharing Schemes and Matroids.

Kaoru Kurosawa, Koji Okada, Keiichi Sakano, Wakaha Ogata, Shigeo Tsujii

Proceedings of the Advances in Cryptology, 1993

1987

Parameterized Programming in OBJ2.

Kokichi Futatsugi, Joseph A. Goguen, José Meseguer, Koji Okada

Proceedings of the Proceedings, 9th International Conference on Software Engineering, Monterey, California, USA, March 30, 1987

1982

A Hierarchical Structuring Method for Functional Software Systems.

Kokichi Futatsugi, Koji Okada

Proceedings of the Proceedings, 1982

1980

Specification Writing as Construction of Hierarchically Structured Clusters of Operators.

Kokichi Futatsugi, Koji Okada

Proceedings of the Information Processing, Proceedings of the 8th IFIP Congress 1980, Tokyo, Japan - October 6-9, 1980 and Melbourne, Australia, 1980