Technically it is possible to restrict read access to an individual topic based on DENYTOPICVIEW ALLOWTOPICVIEW preferences variables, provided that the view script is authenticated.
However this setup is not recommended since all content is searchable within a web a search will turn up view restricted topics.
This setup can be useful to hide a new web until content its ready for deployment. Obfuscating webs is insecure, as anyone who knows the URL can access the web. Authenticate all Webs and Restrict Huge breasts fucking Webs Add view to the list of authenticated scripts in the.