Data Management Data Management Overview Application Data Persistence Overview of Application Data Persistence Persisting Preferences Data Persisting KV Store Data Persisting RDB Store Data Distributed Application Data Synchronization Distributed Application Data Synchronization Overview Cross-Device Synchronization of KV Stores Cross-Device Synchronization of RDB Stores Cross-Device Synchronization of Distributed Data Objects Data Reliability and Security Data Reliability and Security Overview Database Backup and Restoration Database Encryption Access Control by Device and Data Level Cross-Application Data Sharing (for System Applications Only) Cross-Application Data Sharing Overview Sharing Data Using DataShareExtensionAbility Sharing Data in Silent Access