MultiBallot: Verifiable and privacy-preserving E-Collecting in the Swiss setting
It addresses the need for verifiable and privacy-preserving electronic signature collection in the Swiss political context, building on existing e-voting infrastructure.
The paper derives a realistic setting for e-collecting in Switzerland and proposes a secure protocol that achieves both privacy and verifiability under realistic trust assumptions, leveraging parallel active collections to guarantee participation privacy without an anonymous channel.
As part of the political process, citizens may participate in signature collections to influence policy changes. In Switzerland, this even results in legally binding acts, similar to an election system. In this work, we first derive a realistic setting for e-collecting in Switzerland, based on the setting established for e-voting. Then, we propose a secure protocol in this setting, achieving both privacy and verifiability under realistic trust assumptions. Notably, participation privacy is guaranteed without assuming an anonymous channel, by considering the fact that at any given point in time, many collections are active in parallel.