METHOD FOR CIPHERING OF DATA BLOCKS Russian patent published in 1998 - IPC

FIELD: computer engineering and communications. SUBSTANCE: method involves generation of cipher key as sequence of sub-keys, generation of executable code of ciphering software, splitting data blocks into sub-blocks and serial processing of sub-blocks. In addition method involves generation of binary vector and superposition of i-th sub-block Bi with l-th key, where i = 1,2,3,...,N,N≥2 is number of sub-blocks and l = 1,2,3,...K,K≥8 is number of sub-keys. Binary vector value is assigned to sub-key number l. Binary vector is generated from structure of j-th sub-block Bj, where j = 1,2,3,...N,N, and i ≠ j or from structure of j-th sub-block Bj, where i ≠ j and number of sub-key which is superposed on sub-block in previous superposition step. EFFECT: increased speed of ciphering of non-deterministic software ciphers. 3 cl, 2 dwg