# Data Management

- [Data Management Overview](data-mgmt-overview.md)
- Application Data Persistence
  - [Overview of Application Data Persistence](app-data-persistence-overview.md)
  - [Persisting Preferences Data](data-persistence-by-preferences.md)
  - [Persisting KV Store Data](data-persistence-by-kv-store.md)
  - [Persisting RDB Store Data](data-persistence-by-rdb-store.md)
- Distributed Application Data Synchronization
  - [Distributed Application Data Synchronization Overview](sync-app-data-across-devices-overview.md)
  - [Cross-Device Synchronization of KV Stores](data-sync-of-kv-store.md)
  - [Cross-Device Synchronization of RDB Stores](data-sync-of-rdb-store.md)
  - [Cross-Device Synchronization of Distributed Data Objects](data-sync-of-distributed-data-object.md)
- Data Reliability and Security
  - [Data Reliability and Security Overview](data-reliability-security-overview.md)
  - [Database Backup and Restoration](data-backup-and-restore.md)
  - [Database Encryption](data-encryption.md)
  - [Access Control by Device and Data Level](access-control-by-device-and-data-level.md)
- Cross-Application Data Sharing
  - [Data Sharing Overview](data-share-overview.md)
  - [Unified Data Definition](unified-data-definition.md)
  - One-to-Many Data Sharing (for System Applications Only)
    - [Sharing Data Using DataShareExtensionAbility](share-data-by-datashareextensionability.md)
    - [Silent Access via the DatamgrService](share-data-by-silent-access.md)
  - Many-to-Many Data Sharing 
    - [Sharing Data Using Unified Data Channels](unified-data-channels.md)