一个无可信第三方的自组织群体中匿名表决方案*

在一个自组织群体中，成员之间是平等的关系，没有管理者或可信的第三方，典型的网络环境如移动Ad hoc网。给出了这种环境下匿名表决的形式化模型和安全定义，提出了一个具体方案， 基于RSA假设和离散对数困难性假设，在此安全定义下证明了方案的安全性。该方案允许参与者对某问题匿名表决，安全地计算表决结果，参与者之间也不需要任何交互，而且表决协议很容易转换为一个匿名的门限签名方案，在Ad hoc网中保护用户的隐私。

Anonymous Voting Scheme for Self organized Group without Trusted Third Party

In a self organized group with all pair participants, the typical instance of network environment such as the mobile Ad hoc network, there exists no group manager or other trusted third party. This paper defines the formal anonymous voting model and its corresponding security attributes, and propose a concrete such scheme and prove it secure under the security definition based on RSA assumption and the infeasibility of discrete logarithm problem. The scheme allows participants to anonymously vote on some issue and to securely compute the result of vote without any interaction among participants. Furthermore, our scheme is convenient to be converted into an anonymous threshold signature or authentication scheme to protect privacy of users in electronic commerce.