Patent ID: 8601281
Filing Date: 2013-12-03
Classification: G01D

Abstract:
1. A method for operating a sensor apparatus that comprises: a housing having a security device configured to detect unauthorized access to the housing; a secure first computation device having a secure non-volatile first memory arranged in the housing; a second computation device having a second memory or is assigned the second memory arranged in the housing with the second memory; and at least one sensor element electrically coupled to the second computation device configured to supply a sensor signal to the second computation device, the method comprising: detecting a temperature in the housing; activating the first computation device only when the detected temperature is in a predefined temperature range; determining a session key by the first computation device; storing the session key in the second memory; reading at least one program from the first memory by the first computation device; storing the at least one program in the second memory by the first computation device; deactivating the first computation device after the session key is stored in the second memory; determining data based at least in part on the sensor signal; and at least one of encrypting and signing the data by the second computation device based on the session key, wherein the second computation device is operated using the at least one program.