That is a good question. Most of our installations go into private networks where this isn’t a big problem. While sensitive data like authentication credentials are encrypted, the actual data stream is not. Because of this, we recommend that you use a secure connection like a VPN tunnel if the connection is going over a public link.
Soon our FactoryPMI Gateway will offer SSL communication as an option, which will more tightly secure our client-gateway communication.
Thanks for your interest,