智慧城市是由网络、通信设备、硬件、软件、信息资源、信息用户和规章制度组合而成的。
Smart city is made up of network, communication equipment, hardware, software, information resources, information users and rules and regulations.
网络安全是目前信息系统应用的一个重要研究方向，如何确定用户身份以控制用户对信息资源的访问，是其中的一个重要问题。
Network security is an important research area in the application of information system now, How to implement effective access control based on user's identity is very important.
内部域信息识别本地网络上的资源，如客户端计算机和用户帐户。
Internal domain information identifies resources on the local network, such as client computers and user accounts.
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