Using JDeveloper 11g R2, I have downloaded ojdbc8.jar and copied to \wlserver_10.3\server\lib directory.
On the Windows 12 client, SQLNET.ora file has the following
SQLNET.ALLOWED_LOGON_VERSION=8
SQLNET.AUTHENTICATION_SERVICES= (NTS)
NAMES.DIRECTORY_PATH= (TNSNAMES, EZCONNECT)
Inspite of all this when database connection is created and tested, getting the below error
ORA-28040: No matching authentication protocol
The target database is 12c.
Appreciate any help