If your project is connected to Internet, go on with RMI. At the final stage, use SSL to encrypt your communication. As for authentication, it is not a probelm that can be solved by using some protocol. If your business is extremely important,
have your boss negotiate with Verisign oor list like to get certificates. Authentication based on certificates are most serious way to authenticate the partners in communications.
have your boss negotiate with Verisign oor list like to get certificates. Authentication based on certificates are most serious way to authenticate the partners in communications.