Sakumoto Koichi

On the Security of the Algebraic Surface Signature Scheme

Shirai Taizo, Hiwatari Harunaga, Sakumoto Koichi, 2010 .

Public-Key Identification Schemes based on Multivariate Quadratic Polynomials

Shirai Taizo, Hiwatari Harunaga, Sakumoto Koichi, 2011 .