Reo Yoshida
Kyoto University
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Publication
Featured researches published by Reo Yoshida.
international conference on information security and cryptology | 2009
Reo Yoshida; Katsuyuki Takashima
Recently, some cryptographic primitives have been described that are based on the supposed hardness of finding an isogeny between two (supersingular) elliptic curves. As a part of such a primitive, Charles et al. proposed an algorithm for computing sequences of 2-isogenies.However, their method involves several redundant computations. We construct simple algorithms without such redundancy, based on very compact descriptions of the 2-isogenies. For that, we use some observations on 2-torsion points.
Bulletin of The Korean Mathematical Society | 2009
Katsuyuki Takashima; Reo Yoshida
We show that computation of a sequence of Richelot isogenies from specified supersingular Jacobians of genus-2 curves over Fp can be executed in Fp2 or Fp4. Based on this, we describe a practical algorithm for computing a Richelot isogeny sequence.
Archive | 2014
Tetsutaro Kobayashi; Go Yamamoto; Hitoshi Fuji; Tomohide Yamamoto; Reo Yoshida
IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences | 2013
Reo Yoshida; Katsuyuki Takashima
Archive | 2018
Tetsutaro Kobayashi; Go Yamamoto; Reo Yoshida
Archive | 2018
Reo Yoshida; 吉田 麗生; Tetsutaro Kobayashi; 小林 鉄太郎; Yuto Kawahara; 川原 祐人; Hitoshi Fuji; 冨士 仁; Kazuki Yoneyama; 米山 一樹
IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences | 2018
Kazuki Yoneyama; Reo Yoshida; Yuto Kawahara; Tetsutaro Kobayashi; Hitoshi Fuji; Tomohide Yamamoto
Archive | 2017
Reo Yoshida; 吉田 麗生; Tetsutaro Kobayashi; 小林 鉄太郎; Yuto Kawahara; 川原 祐人; Hitoshi Fuji; 冨士 仁; Kazuki Yoneyama; 米山 一樹
Archive | 2017
Yuto Kawahara; 川原 祐人; Hitoshi Fuji; 冨士 仁; Tetsutaro Kobayashi; 小林 鉄太郎; Reo Yoshida; 吉田 麗生; Tomohide Yamamoto; 山本 具英
Archive | 2017
Hitoshi Fuji; Tomohide Yamamoto; Tetsutaro Kobayashi; Reo Yoshida
