METHOD FOR ITERATIVE CRYPTOGRAPHIC TRANSFORMATION OF DATA Russian patent published in 2014 - IPC H04L9/00 G06F21/72 

FIELD: radio engineering, communication.

SUBSTANCE: method involves generating a sequence of round keys K₁, K₂,…, K_R, where R is the number of transformation rounds, from a private key using a key turning procedure; executing R transformation rounds; each round key used at the i-th round (K_i) is used to generate N round sub-keys K_i1. K_i2,…, K_in, where N is the number of paths of round transformations in each round; when executing each i-th round, N copies C_i1, C_i2,…, C_in of an input unit C are created, each copy C_ij subjected to stochastic transformation E_ij, which is recorded in the form C_ij:=F_ij(C_ij, K_ij); the transformed values C_ij are transmitted to inputs of a combinational circuit F, the function of which is a parallel composition of different paths of round transformations; the result of actions of the combinational circuit C:=F(C_i1, C_i2, …, C_in) is declared the round result, which is transmitted to the input of the next round for i<R, and the result of the actions of the last round is the transformation result.

EFFECT: high cryptographic robustness and faster cryptographic transformation of data.

3 cl, 3 dwg