The Core Authentication Module contains general authentication properties that can be defined globally using the OpenSSO Enterprise console (under the Configuration tab) or more specifically for each configured realm (under the Access Control tab). Core authentication properties are added and enabled for the top-level realm during installation. As new realms are configured under the top-level realm, these properties (and the values defined globally for them) are dynamically added to each new realm when it is created. Once added, new values can be defined and configured values can be modified by the realm's administrator. The values are then used if no overriding value is defined in the specified authentication module instance or authentication chain. The default values for the Core Authentication Module are defined in the amAuth.xml file and stored in the configuration data store. For more information, see Chapter 3, Configuring Authentication, in Sun OpenSSO Enterprise 8.0 Administration Guide and the Sun OpenSSO Enterprise 8.0 Administration Reference.