Ryuichi Sakai

According to our database, Ryuichi Sakai authored at least 15 papers between 2002 and 2026.

Collaborative distances:

• Dijkstra number of five.
• Erdős number of four.

2026

Acceleration of ID-NIKS Based on Discrete Logarithm Problem by Parallelization of <i>ρ</i> Method Using Distinguished Point Method.

Hayato Inoue, Mizuki Miki, Ryuichi Sakai, Yasuyuki Murakami

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2026

2022

High-Density Knapsack Cryptosystem using Shifted-Odd and Super-Increasing Sequence.

Minami Sato, Sosuke Minamoto, Ryuichi Sakai, Yasuyuki Murakami

Proceedings of the International Symposium on Information Theory and Its Applications, 2022

2018

Equivalent Secret Key Attack against Knapsack PKC based on Subset Sum Decision Problem.

Ryuichi Sakai, Yasuyuki Murakami

Proceedings of the International Symposium on Information Theory and Its Applications, 2018

Security of Knapsack Cryptosystem Using Subset-Sum Decision Problem against Alternative-Solution Attack.

Yasuyuki Murakami, Ryuichi Sakai

Proceedings of the International Symposium on Information Theory and Its Applications, 2018

2014

New method for factoring two RSA moduli with implicit hint.

Ryuichi Sakai, Masao Kasahara

Proceedings of the International Symposium on Information Theory and its Applications, 2014

2012

Security analysis of shifted odd knapsack public key encryption scheme.

Ryuichi Sakai, Yasuyuki Murakami, Masao Kasahara

Proceedings of the International Symposium on Information Theory and its Applications, 2012

2009

Cryptanalysis on 2 Dimensional Subset-sum Public Key Cryptosystem.

Tomohiro Shintani, Ryuichi Sakai

Proceedings of the 2nd International Conference on Interaction Sciences: Information Technology, 2009

2008

A Fuzzy ID-Based Encryption Efficient When Error Rate Is Low.

Jun Furukawa, Nuttapong Attrapadung, Ryuichi Sakai, Goichiro Hanaoka

Proceedings of the Progress in Cryptology, 2008

2007

Identity-Based Broadcast Encryption.

Ryuichi Sakai, Jun Furukawa

IACR Cryptol. ePrint Arch., 2007

2005

A Construction of Public-Key Cryptosystem Based on Singular Simultaneous Equations.

Masao Kasahara, Ryuichi Sakai

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2005

Meta Ring Signature.

Hiroyuki Okazaki, Ryuichi Sakai, Masao Kasahara

IACR Cryptol. ePrint Arch., 2005

2004

A Construction of Public Key Cryptosystem for Realizing Ciphertext of Size 100 Bit and Digital Signature Scheme.

Masao Kasahara, Ryuichi Sakai

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2004

2003

ID based Cryptosystems with Pairing on Elliptic Curve.

Ryuichi Sakai, Masao Kasahara

IACR Cryptol. ePrint Arch., 2003

A Construction of 100 bit Public-Key Cryptosystem and Digital Signature Scheme.

Masao Kasahara, Ryuichi Sakai

IACR Cryptol. ePrint Arch., 2003

2002

A New Traitor Tracing.

Shigeo Mitsunari, Ryuichi Sakai, Masao Kasahara

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2002