全局变量的另一重要方面是，当考虑到信息安全问题时，可以控制对信息的访问。
Another important aspect of global variables is that when security of the information is an issue, controlling access is possible.
在一个门户网站，您可以建立单点登录，或者对信息、应用程序、流程和人的访问进行个人化和控制。
On a portal, you can establish a single sign-on, or personalize and control your access to information, applications, processes, and people.
如果我们能够有效地控制对每个人的信息的访问，那么具有健壮且灵活的会话管理和用户管理会使实现更容易。
If we were to be able to effectively control access to the information for each persona, having robust and flexible session and user management would make our implementation easier.
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