Electronic Voting Scheme Based on Blockchain and SM2 Cryptographic Algorithm Zero-Knowledge Proof

Voting is an important basis for making decisions in social life. With the development of society, the efficiency of counting has been improved and the error rate of manual counting has been reduced by using electronic voting technology. However, the problems, such as voter information leakage, ballot reuse, and the authenticity of tallied results still exist. To solve these problems, a blockchain-based electronic voting scheme and a zero-knowledge proof protocol based on the SM2 cryptographic algorithm is proposed in this paper. Before voting, the zero-knowledge proof protocol is used to verify the voting qualification of the voter without disclosing the voter's identity. In the voting stage, a blind signature algorithm based on SM2 is used to verify the validity of the ballot and protect the privacy of the ballot information. In the counting process, the PBFT algorithm is used to ensure that the counting nodes count votes normally and produce accurate and credible counting results. Security analysis and performance analysis show that the proposed scheme meets the security requirements of the electronic voting protocol and has stronger security, privacy, and efficiency than the existing schemes.