CSI-Otter: Isogeny-based (Partially) Blind Signatures from the Class Group Action with a Twist

ePrint Report: CSI-Otter: Isogeny-based (Partially) Blind Signatures from the Class Group Action with a Twist

Shuichi Katsumata, Yi-Fu Lai, Jason T. LeGrow, Ling Qin

In this paper, we construct the first provably-secure isogeny-based (partially) blind signature scheme.
While at a high level the scheme resembles the Schnorr blind signature, our work does not directly follow from that construction, since isogenies do not offer as rich an algebraic structure.
Specifically, our protocol does not fit into the "linear identification protocol" abstraction …

action class csi eprint report high jason report signature signatures