跨服务器的通信必须确保安全。
至于跨域的限制，跨文档进行消息传输的API非常有趣的允许跨源(cross -origin)通信，但是开发者需要非常小心的使用它，在任何时候确保安全性。
About cross-domain limitation, the cross Document Messaging API is interesting to allow cross-origin communication but the developer as to be very careful using it and ensure security at all time.
GnuPG是GNU用于确保安全通信和数据存储的工具。
GnuPG is GNU's tool for secure communication and data storage.
确保安装了EveryplaceAccess客户端，并且检验设备代理能否同设备管理器服务器通信。
Ensure that the Everyplace Access client is installed and verify that the device agent can communicate with the device Manager server.
目前它广泛的用于生产、保安、野外工程等领域的小范围移动通信工程中。
At present, it is widely used in small scope mobile communication project, such as production, security, open country project.
对改进协议的安全性及效率的分析表明，改进协议在确保安全的前提下降低了通信开销。
The analysis on security and efficiency shows that the efficiency of wireless communication is improved without security loss.
对改进协议的安全性及效率的分析表明，改进协议在确保安全的前提下降低了通信开销。
The analysis on security and efficiency shows that the efficiency of wireless communication is improved without security loss.
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