VERFAHREN ZUR AUSFÜHRUNG EINES MASCHINENCODES EINER SICHEREN FUNKTION

摘要

The invention relates to an execution method that comprises the following operations: - every time an instruction to be protected of a preceding base block is loaded, constructing (157) a new value of a signature of this preceding base block from the value of this instruction to be protected and the preceding value of the signature, - loading (162) an initialisation vector contained in a subsequent base block and calculating (164), from said loaded initialisation vector, a value reached for signing the preceding base block, - comparing (166) the constructed value of the signature with the expected value of this signature, and - only if these values do not match, triggering (170) the signalling of a fault during the execution of the machine code.