The messages exchanged are tamper-proof so that no third party can change the content and cause harm to either party.

交换的消息可以防止篡改，所以没有第三方能够更改内容或者对任何一方造成损害。

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One of the key advantages of DSig-based protocols is the ability to both assert identity and create a tamper-proof envelope of the content of the message which are often both required together.

基于DSig的协议有个很主要的优势——断定身份的同时还能创建消息内容的防篡改信封，这两个功能通常都要求同时出现。

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