Follow the instructions here to restrict access to a specific page in your wiki space.
Restricting a page will restrict not only the page itself, but also any files you have attached to this page. All child pages of this page will also inherit the same restrictions.
To require anyone with a UAlbany NetID to log in to view your content, add the group "confluence-users" to the Viewing restrictions.
If you are unable to edit the page restrictions, please consider the scenario described in this article.
Need more help? Submit an ITS Service Desk Request.