Efficient Privacy-Preserving Electronic Voting Scheme Based on Blockchain

In the Internet era, electronic voting has replaced traditional paper voting forms with advantages of low cost, high work efficiency, and low errors. A blockchain as a trustworthy and secure decentralized and distributed network provides new ideas for electronic voting schemes. The paper proposes an electronic voting scheme based on a distributed SM2 encryption scheme with differential privacy mechanism, designing and implementing smart contracts based on the proposed secure voting scheme. The performance of the proposed voting scheme is tested on the Ethereum’s private chain, and its test contents include the computing cost and network consumption of key methods. The test results show that the blockchain-based voting scheme designed in this paper has good performance, and it also proves the feasibility and correctness of the voting scheme.