Microsoft Jet provides security services you can use to protect objects in the database from unwanted access. The security model relies on users and groups defined in a workgroup information file. The Groups collection is used by Microsoft Jet in its security model to control access to objects. The Groups collection contains all Group objects. A Group object defines a group of users as it exists in the Workspace object’s workgroup information file. Each Group object also has a Users collection that contains a User object for each of the users in the group.