O7_dictionary_accessibilty parameter : does it influence the security of the DB ?

o7_dictionary_accessibilty parameter : does it influence the security of the DB ? If yes, how ? If no, why not ?
Thanx a lot !
Regards,
Luc

The o7_dictionary_accessibility parameter can be used to prevent (if set to false) the viewing of the data dictionary (SYS tables and views) by users with an "ANY" privilege (e.g. SELECT ANY TABLE). If set to false, then a user must be granted explicit access to a SYS object or through the roles SELECT_CATALOG_ROLE, EXECUTE_CATALOG_ROLE, and DELETE_CATALOG_ROLE.
Oracle9i provides the privilege SELECT ANY DICTIONARY (Oracle9i) which gives access to the entire data dictionary (SYS tables and views). The role SELECT_CATALOG_ROLE limits access to SYS views.

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