Data processing system e.g. internal combustion engine control, for motor vehicle, has ROM containing operational data, where part of unencrypted data has decryption key computing algorithm that is executed in runtime of system

摘要

The system has a read only memory (ROM) containing program instructions and parameters, which are referred as operational data, to be executed by a microcontroller module (1). A part of unencrypted operational data has a decrypting algorithm and an algorithm for computing a key required for decryption, which is executed in the runtime of the system. The key computing algorithm is stored in a memory integrated into the module. An independent claim is also included for a method for operating a data processing system.