METHOD OF PROTECTING INFORMATION FROM UNAUTHORISED ACCESS Russian patent published in 2011 - IPC G06F12/14 

FIELD: information technology.

SUBSTANCE: original message is distorted at the transmitting side using a pin-code P. The i-th word is mapped, where and I is the number of words in the original message, into the corresponding code D_i based on a table of possible values, code D_i is replaced with code D_Ki by shifting the code D_i on a ring by a number of lines given in the pin-code P in the forward direction, the distorted message is transmitted to a communication channel, and at the receiving side, code D_i is restored by shifting code D_Ki on a ring by a number of lines given in the pin-code P in the reverse direction, code D_i is mapped into the corresponding word based on a table of possible values.

EFFECT: more secure information transmission.

1 dwg, 2 tbl