METHOD FOR CRYPTOGRAPHIC TRANSFORMATION OF INFORMATION AND APPARATUS FOR REALISING SAID METHOD Russian patent published in 2013 - IPC H04L9/00 G06F12/06 G06F21/70 

FIELD: information technology.

SUBSTANCE: method is based on breaking down an initial 32-bit input vector into eight serial 4-bit input vectors. Conversion tables are placed in each replacement unit, each table having sixteen rows, each row having four padding bits corresponding to 4-bit output vectors. Four replacement units are used, one for each pair of 4-bit input vectors, wherein each replacement unit employs a 16-byte or more central processing unit register in which two conversion tables are placed, and conversion of pairs of 4-bit input vectors to pairs of 4-bit output vectors in accordance with the conversion unit is carried out by switching the rows of the conversion tables to the central processing unit register of the corresponding replacement unit using pairs of 4-bit input vectors in form of switching addresses, after which the 4-bit output vectors are combined in series into a 32-bit output vector.

EFFECT: high security and fast transformation of data in a processor.

3 cl, 2 dwg