With the help of a semi-honest third party Calvin, n parties P1,P2,…,Pn can determine whether all of their private inputs X1,X2,…,Xn are equal or not without leaking any information. In this paper, we present a novel protocol using special quantum unitary operations and n-dimensional n-particle GHZ states. The proposed protocol is correct. It can also resist various outside attacks and overcome the problem of information leakage.

中文翻译：

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基于n维n粒子GHZ态的新型多方量子私有比较

在半诚实的第三方卡尔文的帮助下，n派对磷1,磷2,…,磷n可以确定他们所有的私人输入是否X1,X2,…,Xn在不泄露任何信息的情况下是否相等。在本文中，我们提出了一种使用特殊量子酉运算和n维n-粒子GHZ状态。提议的协议是正确的。它还可以抵抗各种外部攻击，克服信息泄露的问题。