Advanced Security Guide Using Transparent Data Encryption Part I Using Transparent Data Encryption Part I describes how to use Transparent Data Encryption. Introduction to Transparent Data EncryptionTransparent Data Encryption enables you to encrypt sensitive data, such as credit card numbers or Social Security numbers. Configuring United ModeUnited mode enables you to create a common keystore for the CDB and the PDBs for which the keystore is in united mode. Configuring Isolated ModeIsolated mode enables you to create a keystore for each pluggable database (PDB). Using Transparent Data Encryption with Other Oracle FeaturesYou can use Oracle Data Encryption with other Oracle features, such as Oracle Data Guard or Oracle Real Application Clusters. Encrypting Columns in TablesYou can use Transparent Data Encryption to encrypt individual columns in database tables. Encryption Conversions for Tablespaces and DatabasesYou can perform encryption operations on both offline and online tablespaces and databases. Managing the Keystore and the Master Encryption KeyYou can modify settings for the keystore and TDE master encryption key, and store Oracle Database and store Oracle GoldenGate secrets in a keystore. Administering United ModeAdministering united mode means managing the keystores, master encryption keys, and general Transparent Database Encryption (TDE) functionality. Administering Isolated ModeAdministering isolated mode means managing the keystores, master encryption keys, and general Transparent Database Encryption (TDE) functionality. General Considerations of Using Transparent Data EncryptionWhen you use Transparent Data Encryption, you should consider factors such as security, performance, and storage overheads. Using sqlnet.ora to Configure Transparent Data Encryption KeystoresConfiguring TDE with sqlnet.ora parameters has been deprecated, but is still possible depending on your database configuration. Frequently Asked Questions About Transparent Data EncryptionUsers frequently have questions about transparency and performance issues with Transparent Data Encryption.