Oracle Autonomous Data Warehouse provides two options for Transparent Data Encryption (TDE) to encrypt your database: Oracle-managed encryption keys and Customer-managed encryption keys. By default, the Oracle Autonomous Data Warehouse associated with Oracle Fusion Data Intelligence is set up using the Oracle-managed key. If your organization's security policies require customer-managed encryption keys, then you can configure Oracle Autonomous Data Warehouse to use an Oracle Cloud Infrastructure Vault master encryption key. With customer-managed master encryption keys, Oracle Autonomous Data Warehouse uses the master encryption key to generate the TDE master key. However, if your organizational policies change, you can revert to the Oracle-managed key. See Manage Encryption Keys on Autonomous Database.