Internet Technologies 简明教程
Digital Signature
Digital Signature
Digital signatures 允许我们验证签名作者、日期和时间，验证邮件内容。它还包括用于额外功能的身份验证功能。
Digital signatures allow us to verify the author, date and time of signatures, authenticate the message contents. It also includes authentication function for additional capabilities.
Applications
在通信中实施数字签名有几个原因：
There are several reasons to implement digital signatures to communications:
Authentication
数字签名有助于验证消息的来源。例如，如果银行的分行向总行发送消息，要求更改账户余额。如果总行无法验证该消息是由授权来源发送的，则根据此类请求采取行动可能会犯下严重错误。
Digital signatures help to authenticate the sources of messages. For example, if a bank’s branch office sends a message to central office, requesting for change in balance of an account. If the central office could not authenticate that message is sent from an authorized source, acting of such request could be a grave mistake.