Katsuyuki Takashima

Decomposed Richelot isogenies of Jacobian varieties of hyperelliptic curves and generalized Howe curves

2021 · arXiv (Cornell University)

We advance previous studies on decomposed Richelot isogenies (Katsura--Takashima (ANTS 2020) and Katsura (ArXiv 2021)) which are useful for analysing superspecial Richelot isogeny graphs in cryptography. We first give a characterization of decomposed Richelot isogenies …