Deim Seminar
Title
Reducing the Share Size of Weighted Threshold Secret Sharing Schemes via Chow Parameters Approximati
Conferenciant
Miquel Guiot
Professor/a organitzador/a
Oriol Farrās
Institution
URV
Date
16-10-2024 12:00
Summary
Abstract:
A secret sharing scheme is a cryptographic primitive that allows a dealer to share a secret among a set of parties, so that only authorized subsets of them can recover it. The access structure of the scheme is the family of authorized subsets. In weighted threshold access structures, each party has a weight, and subsets are authorized if their combined weight reaches a threshold. For these access structures, existing secret sharing schemes result in large shares that scale linearly with the weights. To improve efficiency, the access structure can be approximated. This talk focuses on balancing efficiency and accuracy in such approximations by using techniques based on the Chow parameters.
This is a joint work with Oriol Farrās and will be presented in Theory of Cryptography Conference (TCC) 2024.
Place
Laboratori 231
Language
Anglčs
