DATA PROCESSING DEVICE WITH MEANS FOR COUNTERACTING ANALYSIS METHODS FOR THE DETECTION OF A SECRET CHARACTERISTIC VALUE

摘要

A data processing device ( 1 ) which includes a circuit ( 2 ) with data processing means ( 17 ) which are suitable for processing data (DA) while utilizing a characteristic value (CV) and with sequencing means ( 15 ) which are arranged to execute an algorithm in order to control the data processing means ( 17 ) in conformity with this algorithm which comprises a given number N of sub-algorithms containing identical successions of algorithm steps, is additionally provided with order fixation means ( 29 ) which co-operate with the sequencing means ( 15 ) and whereby, each time when the algorithm is executed, an order can be fixed from a plurality of feasible orders for the execution of the N sub-algorithms.