How to fix the Oracle error ORA-28233: double encryption not supported?

In this post, you’ll learn more about the Oracle ErrorORA-28233: double encryption not supported with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-28233: double encryption not supported

Reason for the Error ORA-28233: double encryption not supported

The obfuscation toolkit does not support the encryption of already-encrypted data.

How to fix the Error ORA-28233: double encryption not supported ?

You can fix this error in Oracle by following the below steps

Do not attempt to encrypt already-encrypted data.