In previous releases of Oracle, the database links and scheduler links password are stored in password column in sys.link$ and sys.scheduler$_link table, however the passwords are obfuscated not encrypted.
We can encrypt the obfuscated password in 18c using “alter database dictionary” command.
Create a keystore and define encryption method
ADMINISTER KEY MANAGEMENT CREATE KEYSTORE ‘/etc/ORACLE/WALLETS/orcl’ […]
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