| 摘要 |
<P>PROBLEM TO BE SOLVED: To allow only a purchaser of a commodity to perform campaign entry even in a two-dimensional code printed on the package surface of the commodity in a bare state. <P>SOLUTION: When a mobile phone receives purchase history information, the mobile phone synchronizes an algorithm variable by time by the same algorithm as a Web campaign server to generate a pass key, reads the two-dimensional code printed on a package of the commodity, and sends it to the Web campaign server together with the pass key. The Web campaign server synchronizes the algorithm variable by time by the same algorithm as the mobile phone to generate a pass key, stores two-dimensional codes printed on the packages of the already shipped commodities, receives the two-dimensional code and the pass key from the mobile phone, and admits the campaign entry when there is the received two-dimensional code in the stored two-dimensional codes and when there is the received pass key in already generated pass keys. <P>COPYRIGHT: (C)2011,JPO&INPIT |
