Abstract: A method and a device for checking the integrity of modules of a technical facility. The technical facility has multiple modules and sets of controls for controlling the technical facility. For starting up each set of controls and the overall technical facility, a master key is used which is utilized for decrypting an encrypted region of the set of controls. The master key for starting up a set of controls of the technical facility is derived from features of all sets of controls installed in the technical facility, and a start or a start-up of the technical facility can take place only when the master key is found to be satisfactory.

Abstract: The invention relates to a method and a device for checking the integrity of modules of a technical facility. The technical facility has multiple modules and sets of controls (16, 17, 18) for controlling the technical facility. For starting up each set of controls (16, 17, 18) and the overall technical facility, a master key (49) is used which is utilized for decrypting an encrypted region of the set of controls (16, 17, 18). According to the invention, the master key (49) for starting up a set of controls (16, 17, 18) of the technical facility is derived from features of all sets of controls (16, 17, 18) installed in the technical facility, and a start or a start-up of the technical facility can take place only when the master key (49) is found to be satisfactory.