METHOD TO PROTECT TEXT INFORMATION AGAINST UNAUTHORISED ACCESS Russian patent published in 2012 - IPC G06F21/24 

FIELD: information technologies.

SUBSTANCE: method includes the following: coding of a text message A, its transfer, decoding of a received text message A, provision of a recovered message to a user, at the same time prior to coding the initial text message A is distorted on the transmitting side with the help of an available PIN code P, by display of i word, where and I - number of words in the initial message, into an appropriate code D_i by a table of possible values, replacement of a D_i code for a code D_ki by means of D_i code shift, along the ring by the specified number of k lines in the PIN code P in forward direction, and on the receiving side after decoding the D code is restored; i received word by shift of the D code along the ring by the specified number of k lines in the PIN code P in reverse direction, the code D_i is displayed into an appropriate i word by the table of possible values.

EFFECT: higher security of text information transfer by using distortions in systems of data transfer without usage of secret keys and PIN codes.

2 cl, 1 dwg