methods and devices for non linear quantification based on modulo 2 addition (24) by means of alternative technologies for the use of the combination of block substitution with a relatively simple equipment, however, making the cryptanalysis more difficult. cult.the basic block (22), a projection point of binary numbers of n bits of themselves.based on the fact that certain permutations of the n bit binary numbers define a substitution block by means of a modulo 2 addition (24) connected to a number relative to another, and that a subset of these sets of equations with a report in - seen as a means of delivery.this allows a simple transformation frequency. the nonlinear equations are then made, in a logical manner (34), and a variable, so that the rest of the equations cannot be generated from a limited subset of the equations.the invention describes various properties of the transformations, as well as the processes used to implement them.
展开▼
