Because a signature alone does not guarantee that the sender is who they say they are, the message transmission is vulnerable to techniques such as replay attacks by some malicious third party.

因为仅仅有数字签名并无法保证发送方就是他们自己所声称的人，消息的传输很容易遭受恶意第三方诸如再现攻击等技术的袭击。

youdao

The signature on a negotiable instrument shall be the true name of the party thereto.

在票据上的签名，应当为该当事人的本名。

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The digital signature on a public key certificate can validate the authenticity of the public key and therefore the party who holds it.

公钥证书上的数字签名可以验证该公钥的可靠性以及持有它的那一方的可靠性。

youdao

Mr Paisley had secured the necessary 30 signatures to table his motion on Monday when he secured the signature of a member of David Trimble's assembly party, Pauline Armitage.

BBC: Sinn Fein exclusion debate scheduled

It's a signature move from the maverick veteran senator, one clearly designed to energize the Republican party, counter Democratic nominee Barack Obama's message of generational change and court women voters.

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