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\(\mathsf {opn.vote}\) is a publicly verifiable e-voting system that mitigates the single point of failure in traditional bulletin board architectures by moving critical processes to a public blockchain. Using Ethereum’s Account Abstraction, it lets voters cast and re-cast ballots without wallets or cryptocurrency. The protocol combines Schnorr blind signatures with ElGamal encryption to ensure anonymity and auditability. \(\mathsf {opn.vote}\) pilots in Germany’s Abstimmung21 referendum in September 2025, aiming to shift 50% of votes online while reducing per-vote transaction costs from €2 to under €0.01. Compared to MACI, Ethereum’s leading voting system, it achieves approximately two times lower on-chain costs.

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\(\mathsf {opn.vote}\) : A Publicly Verifiable Blockchain-Based eVoting System

  • 会议论文

  • 发表日期：

    2026年

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  • Felix Maduakor,
  • Thi Van Thao Doan,
  • Joerg Mitzlaff

摘要

\(\mathsf {opn.vote}\) is a publicly verifiable e-voting system that mitigates the single point of failure in traditional bulletin board architectures by moving critical processes to a public blockchain. Using Ethereum’s Account Abstraction, it lets voters cast and re-cast ballots without wallets or cryptocurrency. The protocol combines Schnorr blind signatures with ElGamal encryption to ensure anonymity and auditability. \(\mathsf {opn.vote}\) pilots in Germany’s Abstimmung21 referendum in September 2025, aiming to shift 50% of votes online while reducing per-vote transaction costs from €2 to under €0.01. Compared to MACI, Ethereum’s leading voting system, it achieves approximately two times lower on-chain costs.