Method and apparatus for buyer identification

(57) Summary book invention includes the equipment and the method of generating and memorizing a buyer's electronic portrait in the equipment of an individual like a mobile phone. With an electronic portrait, since a seller compares with a buyer in the case of dealings, generation of the physical identification information of is enabled. A seller can check whether the physical identification information transmitted to a seller via a wireless-communications circuit is used, and it has the authority in which a buyer can trade.