User Access Control System

Programs must sometimes enforce their own access control requirements on resources they are responsible for and on user accounts not recognized by the operating system.

对于所负责的资源和操作系统无法识别的用户帐户，程序有时必须强制实施它们自己的访问控制要求。

Regardless of whether your application's access control will be based on passwords or roles, you'll still need a login and logout system to handle user authentication.

不管应用程序的访问控制基于密码还是基于角色，您都需要一个登录和注销系统来处理用户身份验证。

Just like tables, nicknames have an equivalent set of privileges that can control user access to the nickname objects on the federated system.

与表一样，昵称也有对等的一组权限，用于控制用户在联邦系统上对昵称对象的访问。