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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USB Disk Authentication - Configure a USB device to act as a "key" to view encrypted information (it must be plugged into the system for access).

盘认证-配置一个USB设备作为一个“钥匙”来查看加密的信息(必须作准入制度堵塞)。

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