The prototype system realizes the key parts of the secure component: authentication center, message secure proxy and access controler.

该原型系统实现了安全构件的关键部分：认证服务器、消息安全代理和访问控制器。

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Luckily, SSH supports public or private key authentication and system aliases.

幸运的是，ssh支持公钥或私钥身份验证和系统别名。

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The model not only realizes key management, encrypted communication, digital signature and identity authentication, but also is fit for network system with real time and large data transfer.

本模型不仅适用于实时的、大数据传输的网络系统，而且实现了密钥管理、加密管理、数字签名以及身份认证等功能。

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