BUFF Transform for Isogeny-Based Sqisign Digital Signature
Toma Diaconescu-Grabari · 2024
This thesis covers the mathematics of isogeny-based cryptography and presents the SQISign digital signature.SQISign is a digital signature, submitted to NIST's post-quantum cryptography standardization program.The thesis also covers the security notions for digital signatures called Beyond UnForgeability Features (BUFF) and discusses these security notions within the context of SQISign.A general transformation for digital signatures, called the BUFF transform, can be used to achieve all BUFF notions.This thesis ends with an application of the BUFF transform to SQISign and analyzes the performance impact.