In this article, there is detailed information regarding securing your password for a JDBC connection in POSTGRE SQL.
The postgreSQL driver documentation indicates the connection URL can include the attribute ssl=true to enable SSL. This key=value option could alternatively be specified in the node's DbOptions properties.
The client configuration section would indicate the server's certificate would need to be installed if it is not signed by a global CA. You would need to install the server certificate as described in the help (Reference > SSL configuration) or https://d3sa-preview.infogixsaas.com/docs/dist/help/Default.htm#h-tech-guides/adding-SSL.htm.
You would need to use the der format for the client certificate. Then import the certificate into the Java keystore used by Analyze - i.e. using the keytool command for the bundled java for your install e.g. for a desktop install at:
Alternatively, the client configuration information would imply you may be able to specify the location of the files in the connection URL.