PROVISION OF SECURE COMMUNICATION IN A COMMUNICATIONS NETWORK CAPABLE OF OPERATING IN REAL TIME

摘要

Provided is a device for integrity checking, which is used to provide secure communication between at least two communication partners inside a communications network capable of operating in real time, particularly in the environment of industrial production and/or automation, the device including: a unit for receiving a formed first integrity reference value for at least one isolated message and/or for receiving at least one formed second integrity reference value for at least one isolated message; a unit for correlating the first integrity reference value with the at least second integrity reference value and for comparing same; and a unit for emitting a warning and/or alarm signal, which is provided for a position initiating corresponding counter-measures when the correlated integrity reference values deviate from each other.