Abstract: A data-processing system having at least one operating memory holding operating data is provided with a protection unit having an execution environment protected from unauthorized access. At least one monitoring logic in the execution environment is connected to the operating memory for monitoring unauthorized modifications, access, or similar protection violations of the operating data stored in the operating memory and for generating an output on detection of such a protection violation. A protection logic in the execution environment holds replacement data capable of replacing the operating data and is connected to the monitoring logic for, on generation of the output, providing to the operating memory the replacement data for the operation or for a substitute operation of the data-processing system.

Abstract: The invention relates to an electrical system of a motor vehicle with control apparatuses, which communicate with one another by means of a data bus. To recognize manipulations to the electrical system of a motor vehicle, in particular on the software of the control apparatuses of the electrical system, and to derive suitable measures, it is proposed that a master security module is provided in a first control apparatus and a client security module is provided in each case in a plurality of the further second control apparatuses, and the master security module of the first control apparatus, preferably a central gateway control apparatus, signs a message and sends the signed message to at least one of the second control apparatuses by means of the data bus. The client security module of the second control apparatus checks the signed message received from the master security module as to whether it comes from an authorized master security module.

Abstract: A central check device is provided in a motor vehicle, to which device an enable message emitted by a first controller inside the vehicle or from a location outside the vehicle is supplied via a communication bus of the motor vehicle. The central check device evaluates the received enable message to identify the sequence control system to be enabled and the controller which comprises the sequence control system to be enabled. The central check device sends an enable command to the identified controller via the communication bus of the motor vehicle so as to enable the sequence control system which is to be enabled.

Abstract: An electric wiring system of a motor vehicle with several control devices that communicate with each other via a data bus, and with an immobilizer is provided. In order to create an electric wiring system of a motor vehicle that includes an immobilizer with high reliability the immobilizer includes at least a first and a second control device from the plurality of control devices and an authentication apparatus, in particular an authentication control device. The authentication information of the plurality of control devices is supplied via the data bus to the authentication apparatus. The authentication cancels the immobilizer of the vehicle when the authentication information transmitted from the first and the second control device corresponds to the authentication information expected for the particular control devices.

Abstract: A control unit is described for technical installations, devices and/or machines having a microprocessor, a programmable memory and a housing enclosing the microprocessor and programmable memory. Data lines lead out of the housing for connection with an external device for writing data to the programmable memory. The control unit is enclosed in the housing such that the operability of the control unit is at least partly destroyed when the housing is opened. The control unit furthermore has a check device that checks for authorization a write access by which data are written to the programmable memory over the data line, and causes the data to be written to the programmable memory only in case of a successful check of authorization.

Abstract: The invention relates to an electrical system of a motor vehicle with control apparatuses, which communicate with one another by means of a data bus. To recognise manipulations to the electrical system of a motor vehicle, in particular on the software of the control apparatuses of the electrical system, and to derive suitable measures, it is proposed that a master security module is provided in a first control apparatus and a client security module is provided in each case in a plurality of the further second control apparatuses, and the master security module of the first control apparatus, preferably a central gateway control apparatus, signs a message and sends the signed message to at least one of the second control apparatuses by means of the data bus. The client security module of the second control apparatus checks the signed message received from the master security module as to whether it comes from an authorised master security module.

Abstract: An electric wiring system of a motor vehicle with several control devices that communicate with each other via a data bus, and with an immobilizer is provided. In order to create an electric wiring system of a motor vehicle that includes an immobilizer with high reliability the immobilizer includes at least a first and a second control device from the plurality of control devices and an authentication apparatus, in particular an authentication control device. The authentication information of the plurality of control devices is supplied via the data bus to the authentication apparatus. The authentication cancels the immobilizer of the vehicle when the authentication information transmitted from the first and the second control device corresponds to the authentication information expected for the particular control devices.

Abstract: A central check device is provided in a motor vehicle, to which device an enable message emitted by a first controller inside the vehicle or from a location outside the vehicle is supplied via a communication bus of the motor vehicle. The central check device evaluates the received enable message to identify the sequence control system to be enabled and the controller which comprises the sequence control system to be enabled. The central check device sends an enable command to the identified controller via the communication bus of the motor vehicle so as to enable the sequence control system which is to be enabled.

Abstract: A data-processing system having at least one operating memory holding operating data is provided with a protection unit having an execution environment protected from unauthorized access. At least one monitoring logic in the execution environment is connected to the operating memory for monitoring unauthorized modifications, access, or similar protection violations of the operating data stored in the operating memory and for generating an output on detection of such a protection violation. A protection logic in the execution environment holds replacement data capable of replacing the operating data and is connected to the monitoring logic for, on generation of the output, providing to the operating memory the replacement data for the operation or for a substitute operation of the data-processing system.

Abstract: A vehicle having electrical or electronic components connected to a communication network also has a security unit connected to the network. This security unit in turn has at least one cryptography module connected to the communication network and with which cryptographic codes are generated, stored, managed or processed and at least one coordination module for the coordination of individual modules within the security unit.

Abstract: A control unit is described for technical installations, devices and/or machines having a microprocessor, a programmable memory and a housing enclosing the microprocessor and programmable memory. Data lines lead out of the housing for connection with an external device for writing data to the programmable memory. The control unit is enclosed in the housing such that the operability of the control unit is at least partly destroyed when the housing is opened. The control unit furthermore hag a check device that checks for authorization a write access by which data are written to the programmable memory over the data line, and causes the data to be written to the programmable memory only in case of a successful check of authorization.