In order to store more sensitive data, most mobile platforms now have some concept of isolated storage or protected storage. Mobile Designer provides an API to allow applications to make use of this kind of storage through the classes in the com.softwareag.mobile.md.io package. Default implementations are provided to store key/value pairs and server to user name/password mappings. In cases where a different security model is desired,you can create your own classes conforming to the interfaces in this package.