METHOD OF CONVERTING INFORMATION WITH SYNCHRONOUS REPLACEMENT OF INITIALISING SEQUENCES IN BLOCKS CONNECTED BY COMMUNICATION CHANNEL WITH UNDEFINED REPLACEMENT PERIOD Russian patent published in 2015 - IPC H04L9/16 

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to communication and can be used to convert an information stream. The method comprises: an initial bit sequence is subjected to a first conversion in a first block to obtain a first bit sequence, which is subjected to a second conversion using an initialising bit sequence to obtain a second bit sequence which is transmitted through a communication channel to a second block, where first conversion is carried out, which is inverse to second conversion of the first block using the initialising bit sequence, the conversion result of which is the first bit sequence, which is subjected to second conversion which is inverse to the first conversion of the first block, the result of which is the initial bit sequence; synchronous replacement of the initialising sequences is carried out when the first part of the first bit sequence of the first and second blocks matches the bit sequence stored in a second storage element of the first and second blocks.

EFFECT: high cryptographic robustness.

2 dwg