METHOD FOR SECURING A COMPUTER INSTALLATION INVOLVING A CRYPTOGRAPHIC ALGORITHM USING BOOLEAN OPERATIONS AND ARITHMETIC OPERATIONS AND THE CORRESPONDING EMBEDDED SYSTEM

摘要

The invention relates to a method for securing a computer installation involving a cryptographic algorithm using boolean operations and arithmetic operations, in which at least one variable is separated into several parts by means of a boolean separation using a boolean operation and an arithmetic separation using an arithmetic operation. The inventive method is characterised in that in order to move from any of said separations to the other, a predetermined number of boolean and arithmetic operations are carried on said parts and at least one variate such that, for each of the values that appear during the calculation, there is no correlation with said variable. The invention also relates to an associated embedded system.