The more digital everyday life becomes, the more the need for data security and privacy protection increases. This is also true of today’s building technology. The Gira F1 is the simple solution for more security in smart buildings in two respects. On the one hand, it can be used as a KNX bridge to connect self-contained KNX systems, while on the other hand, it is also suitable for use in buildings with several residential units to ensure secure door communication data in conjunction with SIP door stations.