| 摘要 |
<P>PROBLEM TO BE SOLVED: To enable the suppression of double issue of an electronic ticket. <P>SOLUTION: When an issuing request for an electronic ticket for contents comes from a user terminal 20, an inquiry part 14 of the ticket issuing device 10 inquires the user terminal 20 whether it has an electronic ticket corresponding to the request or not. The user terminal 20 replies whether it has the corresponding electronic ticket or not responding to the inquiry. When the reply shows that it has not the corresponding electronic ticket, a judgement part 16 of the ticket issuing device 10 judges that the issue of the electronic ticket is necessary to the issue request; and when the reply shows that it has the corresponding electronic ticket, the judgement part 16 of the ticket issuing device judges that the issue is unnecessary. <P>COPYRIGHT: (C)2007,JPO&INPIT |
