FIELD: communication equipment. SUBSTANCE: smart card is equipped with built-in time and date generator. Smart card and user device which receives smart card perform information exchange, and identification. Also devices ensures given time limit for keeping transmitted identity data in user device. For this period, user device is actuated by user identification, while smart card is kept blind, so that it cannot be used for this period. EFFECT: increased security. 8 cl, 6 dwg
