| 摘要 |
Content label categories and associated user restrictions for desired access control may be entered by a privileged user in any communications programs (such as a browser) within a system, and are automatically distributed to all other communications programs (such as a different browser or a newsreader) within the system regardless of whether the same communications protocol is utilized. Communications programs being installed check for access control settings within other communications programs or via a common API in a centrally located operating system access control support function, and employ such settings in configuring internal access controls. Content-based access control is thus implemented uniformly across the system without work arounds being available to the nonprivileged users. Content labels for requested content, which may be embedded within the requested content, contained within a communications header for transactions bearing the requested content, or looked up in internal or external databases utilizing an identifier for the requested content, are checked against content label categories restricted for a current user. If restricted content is detected, the user is prompted for a password before the requested content is displayed.
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