Support for Encrypted Configuration Parameters
Some configuration parameters that are stored in the CES_PARAMETERS database table contain sensitive information, such as authentication credentials, which should be protected. To protect this data, the VALUES column can be encrypted using Oracle WebLogic Server encrypt utility. This utility encrypts cleartext strings for use with Oracle WebLogic Server. Its output can then be used to populate values in CES_PARAMETERS database table.
For detailed information see "encrypt" in the Oracle WebLogic Server Command Reference.