FIELD: information technology.
SUBSTANCE: method comprises: saving the authentication information generated by means of the device based on the user input into the device; receiving the authentication information formed by the POS-terminal based on the user input, when the device approaches the limits of the predetermined range relative to POS-terminal; comparing the generated and the received authentication information; providing the information on the card used in the transaction into the POS-terminal, based on said comparison.
EFFECT: improving the user transaction protection due to the authentication information formed in the device and the authentication information formed in the POS-terminal.
20 cl, 15 dwg
