Oracle Solution for Error ora-12661

ORA-12661: Protocol authentication to be used

What triggered the Error:

The Oracle Advanced Security authentication service has determined that the Oracle Net transport protocol in use is to be utilized to authenticate a user's identity.

What should we do to fix it:

This error is used solely to communicate information between the authentication service and the Oracle Net session layer and should not normally be visible. If the error is seen, contact Oracle Worldwide Support.