在随机预言模型下，可证明该方案在适应性选择消息攻击下是存在不可伪造的。

It is proven to be existential unforgeable against chosen message attack under the random oracle model.

youdao

这样就提供了事实上不可伪造的证据，说明确实发生了特定活动(在我们的示例中，就是执行了由已知的一方发起的事务)。

This provides virtually unforgeable evidence that a specific action occurred (or in our example, a transaction that was executed originated from a party whom we know).

youdao

每个发布的U - Prove令牌都包含了发布方关于所有内容的不可伪造的数字签名，这是通过使用它的私钥由发布方创建的。

Each issued U-Prove token contains an unforgeable digital signature of its Issuer on the entire contents, created by the Issuer by applying its private key.

youdao