Encryption – Encryption is the process of packaging a message in a way that makes it so only people with certain access can open the package. The process of decoding the message, for the authorized user, begins when a key is activated. Think of it like the information existing behind a brick wall. Encryption is different from a firewall but not by much.
For building automation devices, encryption is either built into the device (like Tosibox locks and keys), or added at the edge of the network architecture to insure that data cannot be accessed from unauthorized users. Tridium, for example, with Niagara 4 has improved security with authentication requirements plus encryption for both data in motion and at rest.
As more devices become able to connect to the internet and transmit data between one another and up into the cloud, built-in encryption or encryption at the edge are becoming increasingly important.