Security → Encryption
Starting with this release, you can encrypt sensitive credential data that is stored in the data dictionary SYS.LINK$ and SYS.SCHEDULER$_CREDENTIAL system tables.
Business Benefit: In previous releases, and by default in this release, the data in these tables is obfuscated. However, because of the rise of de-obfuscation algorithms that are available on the Internet, it is important to use a more secure solution to protect this type of sensitive data. You can manually encrypt this data by using the ALTER DATABASE DICTIONARY SQL statement.