In this post, we’re going to be talking about what is happening here in building automation world called certificates. Now you're seeing this at the server and supervisory layers. So, you're seeing supervisory devices and field controllers requiring certificates. You're seeing things like BACnet Secure Connect coming out with certificating requirements. If you've logged into almost any building automation system that's been released over the past year, you've probably seen an option for secure connections, usually something to the form of HTTPS with TLS 1.2 or 1.3.