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.