Firstly the definition of "trust" is given, and then it is proved that the proposed scheme guarantees receipt-free on semi-trusted model which can prevent the crimes of voting such as "vote buying"," coercible vote "etc. 文中首先给出了半信任的定义,然后证明了所提方案在半信任模型下该方案仍然满足无收据性,从而防止了选举中的选票买卖、强迫选举等犯罪行为。