It presents smart card system of session key distribution for communications safety to net video conference transmission, resolves user identity authentication with security.

为网络视频会议传输提供有效的通信安全，采用一个会议密钥分配的智能卡系统，来解决使用者身份认证和通信安全问题。

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Under this background, this paper designs the system from data collection to test results representation, which includes drawing voyage chart, GPS serial port communications and user interface.

在此背景下，本文设计并实现了包括航迹图展示、GPS串口通信以及人机界面三个子系统的从数据采集到试航结果展示的完整的测试系统。

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This system also adopts some technologies such as communications between user space and kernel space, sending package from kernel mode, kernel module hiding, etc.

系统还采用了用户态—内核态通信、内核态发包、内核模块隐藏等技术。

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As an example, the Navy's newest communications satellite, the Mobile User Objective System, or MUOS, is intended to provide more-reliable links for special-operations personnel and other military users than current Navy-operated satellites.

WSJ: U.S. to Trim Commercial-Satellite Use