METHOD FOR CRYPTOGRAPHIC CONVERSION OF BINARY DATA BLOCKS Russian patent published in 1999 - IPC

FIELD: electrical communications and computer engineering. SUBSTANCE: method intended to increase number of various operations depending on block being converted involves division of binary data code into N≥1 data blocks and sequential conversion of data blocks; in addition, control code V is generated; during conversion of data block the latter undergoes at least one exchange control operation depending on value of control code V which is generated according to secret key; control code V is also generated according to current value of converted data block; control code V is likewise shaped according to secret key and to current value of data block. In addition, control code V is generated according to additional binary data. EFFECT: improved stability of code. 5 cl, 15 dwg