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。

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If the guarantee is made by the third party (except the bank and the insurance company), the loan line shall be no more than 60% of auto funds.

以第三方(银行、保险公司除外)保证方式担保的，贷款最高额可达到购车款的60%。

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This week, the only work singled out for a guarantee-specifically, an "irrevocable bid", the newer, happier term used to describe a third-party guarantee-was a 1969 painting by Pablo Picasso.

本周，选出作为担保的唯一作品是Pablo Picasso在1969年的画作，确切地说，这是个“不可撤销标的”，在表示第三方担保时是个很受欢迎的新词。

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It has arranged for outside investors to guarantee Mr. Cohen an undisclosed price for the painting unless another bidder offers even more during the auction an arrangement called a third-party guarantee.

WSJ: Liz Taylor Portrait to Go on Block for $20 Million

Although no third-party company can guarantee you the best rate or a glitch free roll out, they can help you avoid the potentially serious issues that companies face when they decide to implement a new software package.

FORBES: Real Costs of Choosing the Wrong Software Vendor

There is no guarantee that Mr Reeves's pocket map will lead Britain's third party to safety.

ECONOMIST: Bagehot