由于数字签名方案无法保证谁是经签名的消息的目标接收方，那么也就没有人能确定恶意方声明的真实性。

Because the digital signature scheme guarantees nothing about who is the intended recipient of the signed message, nobody can determine whether the malicious party's claim is true or not.

youdao

由于数字签名方案无法保证消息被发送方签名并发送的次数，那么也就没有人能确定恶意接收方声明的真实性。

Because the digital signature scheme guarantees nothing about how many times the message was signed and sent by the sender, nobody can determine whether the malicious recipient's claim is true or not.

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