Side channel analysis of an automotive microprocessor

Automotive electronics are becoming ever more complex. The quantity and sensitivity of data that is transmitted throughout a car is expected to continue to increase in coming years. On board computers can contain information about the car and dictate how the car behaves. This means that these systems need to be secure to protect the data held within such system so that the behaviour cannot be modified by an unauthorised user. This paper outlines a method for implementing AES encryption over a CAN bus and how such a system could be attacked using correlation power analysis.