文中还介绍了DB 2 UDB安全模型，包括用户身份验证、用户和组授权以及超级用户。

It also reviews the DB2 UDB security model, including user authentication, user and group authorization, and super users.

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其中还包括在地址空间之间传输和断言当前任务的用户安全上下文。

The transfer and assertion of the current task’s user security context between address spaces is among these.

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图1展示了这个概念，并且还包括了处理安全性方面问题的事件和特定的HTTP方法(比如GET或POST)事件。

Figure 1 shows this concept, with opportunities to hook in events to handle security aspects, or a particular HTTP method (such as GET or POST) event.

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