Seminario: "Faster Coercion-Resistant E-voting by Encrypted Sorting" - Michele Battagliola
Seminario della serie "Seminari CrypTO", in collaborazione con Telsy SpA, azienda del gruppo TIM specializzata in cybersecurity.
"Faster Coercion-Resistant E-voting by Encrypted Sorting"
Michele Battagliola
Università di Trento
Giovedì 8 Febbraio 2024 - ore 15:00
Aula Seminari - Dipartimento di Scienze Matematiche
Politecnico di Torino
Abstract: Coercion-resistance is one of the most challenging security properties to achieve when designing an e-voting protocol. The JCJ voting scheme, proposed in 2005 by Juels, Catalano and Jakobsson, is one of the first voting systems where coercion-resistance was rigorously defined and achieved, making JCJ the benchmark for coercion-resistant protocols. Recently, the coercion-resistance definition proposed in JCJ has been disputed and improved by Cortier, Gaudry, and Yang. They identified a major problem, related to leakage of the number of discarded votes by revoting; and proposed CHide, a new protocol that solves the issue and satisfies a stronger security notion. In this talk I present an improved version of CHide, that drastically reduce the complexity, that relies on sorting encrypted ballots. The asymptotic complexity of our protocol is competitive with other state-of-the-art coercion-resistant voting protocols satisfying the stronger notion for coercion resistance.
Slides dell'evento: Le slide del seminario posso essere scaricate qui: Slide Battagliola 
(983,53 kB)
Video dell'evento: La registrazione del seminario è disponibile sul Canale YouTube del gruppo CrypTO.
