LIT-SiGamal: An efficient isogeny-based PKE based on a LIT diagram

ePrint Report: LIT-SiGamal: An efficient isogeny-based PKE based on a LIT diagram

Tomoki Moriya

In this paper, we propose a novel isogeny-based public key encryption (PKE) scheme named LIT-SiGamal. This is based on a LIT diagram and SiGamal. SiGamal is an isogeny-based PKE scheme that uses a commutative diagram with an auxiliary point. LIT-SiGamal uses a LIT diagram which is a commutative diagram consisting of large-degree horizontal isogenies and relatively small-degree vertical isogenies, while the original SiGamal uses a CSIDH …

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