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Contribution Details

Type Master's Thesis
Scope Discipline-based scholarship
Title Design and Implementation of a Verifiable Remote Postal Voting System
Organization Unit
Authors
  • Niels Kübler
Supervisors
  • Christian Killer
  • Jan Von der Assen
  • Burkhard Stiller
Language
  • English
Institution University of Zurich
Faculty Faculty of Business, Economics and Informatics
Date 2022
Abstract Text Switzerland allows its citizens to participate in elections and votes by casting ballots via postal mail. This practice, referred to as “Remote Postal Voting”, is a convenient way for voters to cast their ballots without visiting a polling station. However, the application of Remote Postal Voting has raised security concerns regarding vote- and election manipulations by voting officials or third parties. These concerns have been confirmed in practice, where malicious activities have been discovered on multiple occasions. This thesis aims at providing verifiability for Remote Postal Voting procedures by presenting the design and implementation of a verifiable Remote Postal Voting system. The design integrates well into the existing Swiss Remote Postal Voting procedures. It leverages blockchain technology, Homomorphic Encryption, Non-Interactive Zero Knowledge Proofs, and Threshold Cryptography to meet privacy and verifiability requirements. The evaluation shows that the proposed system scales well in the Swiss Remote Postal Voting scenario, whereas further optimization would be necessary for larger countries.
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