Archivio Istituzionale della RicercaCHide is one of the most prominent e-voting protocols, which, while combining security and efficiency, suffers from having very long encrypted credentials. In this paper, starting from CHide, we propose a new protocol, based on multiparty Class Group Encryption (CGE) instead of discrete logarithm cryptography over known order groups. We achieve a computational complexity of .O(nr), for . n votes and . r voters, while calling the MixNet algorithm one time. The homomorphic properties of CGE allow for credentials that are shorter by a factor of 20 while maintaining the same level of security, at the cost of a small slowdown in efficiency.
Enhancing E-Voting with Multiparty Class Group Encryption / Battagliola, Michele; D'Alconzo, Giuseppe; Gangemi, Andrea; Spadafora, Chiara. - (2025), pp. 251-273. (Intervento presentato al convegno 23rd International Conference on Applied Cryptography and Network Security (ACNS 2025) tenutosi a Munich(Germany) nel June 23–26, 2025) [10.1007/978-3-032-01806-9_14].
Enhancing E-Voting with Multiparty Class Group Encryption
D'Alconzo, Giuseppe;Gangemi, Andrea;
2025
Abstract
CHide is one of the most prominent e-voting protocols, which, while combining security and efficiency, suffers from having very long encrypted credentials. In this paper, starting from CHide, we propose a new protocol, based on multiparty Class Group Encryption (CGE) instead of discrete logarithm cryptography over known order groups. We achieve a computational complexity of .O(nr), for . n votes and . r voters, while calling the MixNet algorithm one time. The homomorphic properties of CGE allow for credentials that are shorter by a factor of 20 while maintaining the same level of security, at the cost of a small slowdown in efficiency.
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2025-545.pdf
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https://hdl.handle.net/11583/3004647