Implementing encryption and authentication in KNX using Diffie-Hellman and AES algorithms

The paper deals with the problem of making secure data transmission inside Home and Building Automation environment; here, data exchanged may regard commands to actuators and/or private and secret information. The paper deals with this problem taking into account the KNX communication system, which, at this moment, doesn´t foresee any encryption and authentication mechanisms. A solution for data encryption and authentication will be presented and assessed, comparing it with the current state of the art.