Can I password protect the viewing of pages?

You can password-protect the viewing of any page.  To do this, go to your Update Index and click the "Edit Page Settings" button for the page you'd like to protect.  In the resulting window, change the "Password protect viewing this page" setting to Yes.  Submit the update.

You will also need to define a Viewer Code password, which is used to view the content of the protected pages. To create or edit this password, go to your Update Index and click the My Accounts tab.  Next, click the Password Management link in the left sidebar.  Here, you can edit your Viewer Code password.