The scope of this article is to enable TCPS communication between Stat and Oracle DB 12c and higher. The most important steps are described in the Oracle Support notes
Doc ID 2280787.1 ,
Doc ID 2732618.1 , and
Doc ID 2674842.1 which give the main steps to configure the wallet and certificates created by using the orapki utility, the listener, the tnsnames.ora and the sqlnet.ora for both sides database server and client, so that the communication happens from sqlplus.