Siemens Aktiengesellschaft

Daniela Friedrich

Kai Fischer

Markus Heintel

Rainer Falk

Steffen Fries

Christian Peter Feist

Omar Belhachemi

Provided is a method for producing a product by a machine tool, wherein the control information and/or production data of a machine tool, such as a milling machine, injection molding machine, welding robot, laser cutter or 3D printer, is protected or cryptographically encrypted such that unauthorized copying or modifying is prevented, including the steps: producing product by the machine tool taking into consideration control information which controls the production of the product; generating production data by the machine tool during production of the product, wherein the production data describes the production of the product; providing protection information to the machine tool, which indicates which of the production data is to be protected, and defines a protection method for the production data which is protected; and protecting that production data which, according to the protection information, is to be protected, by the protection method defined by the protection information.

Method for protecting the production data for producing a product

The invention relates to a communication network having at least one network element (NE), via which data associated with the communication are conducted. The method comprises the following steps: securing, by means of a first cryptographic security function, the data (D) that are transferred from at least one first communication device (PLC) to at least one second communication device (PLC), providing a second cryptographic security function, which secures, between a communication device and a network element, messages that are conducted from the first communication device to the at least second communication device via the at least one network element and that contain the data, providing a checking function by means of the at least one network element, which checking function checks the authenticity and/or integrity of the messages on the basis of the second security function, continuing () or stopping () the communication in accordance with the result of the check () by the checking function, wherein, if the communication is continued, the data remain secured by means of the first security function until the data are received by the at least second communication device.

Securing communication within a communication network using multiple security functions

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Munich, Germany

Daniela Friedrich