Using Transparent Data Encryption
Transparent Data Encryption (TDE) allows data to be encrypted at the storage level to protect the data files at the lowest level. From a product perspective, the implementation of Transparent Data Encryption requires no product configuration changes on the application server.
Note: To implement Transparent Data Encryption, DBAs will have to execute appropriate alter statements on product tables to indicate the level of encryption.
For more information about implementing Transparent Data Encryption refer to the Oracle Advanced Security Guide.