This paper presents two approaches of privacy-preserving voting system: Blind Signature-based Voting (BSV) and Homorphic Encryption Based Voting (HEV). BSV is simple, stable, and scalable, but requires additional anonymous property in the communication with the blockchain. HEV simultaneously protects voting privacy against traffic-analysis attacks, prevents cooperation interruption by malicious voters with a high probability, but the scalability is limited. We further apply sampling to mitigate the scalability problem in HEV and simulate the performance under different voting group size and number of samples.

翻译：本文介绍了保护隐私投票制度的两种做法:盲联签名投票(BSV)和动态加密投票(HEV)。BSV简单、稳定和可扩展,但要求在与封锁链的通信中增加匿名财产。HEV同时保护投票隐私,防止交通分析攻击,防止恶意选民以高概率中断合作,但可缩放性有限。我们进一步采用取样方法,以减轻高频投票中的可缩放性问题,并模拟不同投票组规模和样本数量的性能。