2 papers
math.AG2026
Abelian surfaces in Hesse form and explicit isogeny formulas
Thomas Decru, Sabrina Kunzweiler
We develop a new method for the computation of -isogenies between principally polarized abelian surfaces. The idea is to work with models in induced by a symm…
cs.CR2019
Hash functions from superspecial genus-2 curves using Richelot isogenies
Wouter Castryck, Thomas Decru, Benjamin Smith
Last year Takashima proposed a version of Charles, Goren and Lauter's hash function using Richelot isogenies, starting from a genus-2 curve that allows for all subsequent arithmeti…