Oracle supplies self-generated certificates to be used with HTTPS/SSL Ports. During installation, STA generates a certificate using the Java keytool and creates it on your server, using your server hostname.
This way, you can be sure the certificate is coming from the proper server and when you view it, you can verify the hostname along with the Oracle information.
If you wish, you can replace the Oracle certificate with your own approved certificate from a selected certificate authority (for example, VeriSign).
You must perform the following procedures to accept and connect to STA using an HTTPS/SSL connection and, optionally, to replace the Oracle certificate if you elect to.
After you complete these tasks, you must define the keystore and SSL private key alias settings in WebLogic.