HBUS is secure

The communications protocol specify various ways of making the bus secure. You can choose between message contents encryption or full device and master authentication schemes where it is assured that the messages really originate from the authentic source and not a malicious unit

Authentication is optional

Authentication is a resource-hungry procedure and so will only be feasible in better embedded devices. So, you can choose not to use this if you want to develop low-cost, simple devices using low-end embedded devices.

Two kinds of authentication

There are two kinds of authentication: master authentication or device authentication, also called reverse authentication in the documentation. In principle master authentication is more important and also less resource-hungry. Device authentication is also important when the device generates events and data that are critical for automation environment. These two ways of authentication can be enabled in a device independently of each other.