基于这个框架进行了系统的总体设计和详细设计，并通过一些工具包实现了基于PKI的安全电子邮件系统。
According to this frame, carry through the system total design and the system detailed design, use some tool packages realize secure email system based on PKI.
讨论了在企业内部网中电子邮件系统的安全问题。
This paper discusses the security problem of Email system for Intranet.
大多数企业的大多数电子邮件系统不需要PGP或内置公匙加密提供的电子邮件安全级别。
Most corporations do not need the level of email security provided by PGP or built-in public key encryption in most email systems.
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