电子投票匿名性分析

电子投票公布计票结果会影响投票者的匿名性。针对该问题，定义匿名性为投票选择的不确定度，利用熵衡量投票系统的投票者匿名性，比较计票结果公布前后投票者的匿名性变化。分析结果表明，投票规模越小，投票者匿名性在结果公布后受到的损失越大；在小规模电子投票情况下，计票结果应该选择只公布获胜者，不公布具体得票数，以减少投票者匿名的损失。

Anonymity Analysis of Electronic Voting

The disclosure of the number of votes can compromise the voters＇ anonymity of the electronic voting.Aiming at this problem,this paper defines anonymity by using the uncertainty of the voting choices and measures the anonymity of the whole voting system by entropy.It compares the anonymity after the release of the voting results with that before releasing the voting results.Analysis result shows that the smaller the voting scale is,the more the voters＇ anonymity loses.In the design of small-scale electronic-voting scheme,releasing the winner instead of the number of votes that candidates gained decreases the loss of anonymity.