All messages are XML-based, packaged with S-MIME and a little bit of SOAP, and exchanged in a secure manner over public networks like the web.

所有的消息都基于XML，用s - MIME和一些SOAP打包，并且以一种安全的方式在公共网络(如web)上进行交换。

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Secure Multipurpose Internet Mail Extensions (S/MIME) allows digital signatures to be attached to e-mail messages, such that the recipient can verify the identity of the signer.

安全多用途 Internet 邮件扩展（Secure Multipurpose Internet Mail Extensions，S/MIME）允许将数字签名附加到电子邮件消息上，这样接收方就可以验证签名者的身份。

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The solution, which makes use of the method of combining PKI with S/MIME, establishes a system of secure E-mail transfer, according to the application principle of Public Key Infrastructure(PKI).

该方案依据PKI（公钥基础设施）的应用原理，采用PKI与S MIME相结合的方法，建立了基于PKI的安全邮件传输体系。

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