Patent ID: 11914715
Assignee: SIEMENS AKTIENGESELLSCHAFT
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 7:
8. A method for operating a device unit in one operating state from various operating states when the device unit is booted and/or during ongoing operation of the device unit,
wherein, in a first protected operating state, the execution of at least one predeterminable operating procedure is permitted and protected using defined cryptographic means and
wherein, in a second operating state, the first protected operating state is deactivated and at least one changeable operating procedure is permitted and protected using predefinable cryptographic means, wherein the operating state is configured before and/or during the boot procedure and/or the ongoing operation and, if the configured operating state corresponds to the first operating state, so as then to maintain this state, or if the configured operating state corresponds to the second operating state, so as to deactivate the first operating state and to introduce and/or maintain the second operating state;
wherein, on a device side, when the operating state is intended to be protected during a boot procedure and/or during ongoing operation of the device unit, integrity protection measures suitable for booting and/or suitable for ongoing operation are provided, the integrity protection measures comprise device authentication and/or device integrity attestation;
wherein the module is able to freeze a software state loaded by the user that is not authorized by the device manufacturer, wherein the software state loaded by the user is recorded in a reference database during the freeze; and
wherein a third operating state of the device unit simultaneously permits the first and the second operating states executing simultaneously in a combined mode.